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/*
* BK Id: SCCS/s.prom.c 1.48 12/19/01 10:50:58 paulus
*/
/*
* Procedures for interfacing to the Open Firmware PROM on
* Power Macintosh computers.
*
* In particular, we are interested in the device tree
* and in using some of its services (exit, write to stdout).
*
* Paul Mackerras August 1996.
* Copyright (C) 1996 Paul Mackerras.
*/
#include <stdarg.h>
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/version.h>
#include <linux/threads.h>
#include <linux/spinlock.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <asm/sections.h>
#include <asm/prom.h>
#include <asm/page.h>
#include <asm/processor.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/smp.h>
#include <asm/bootx.h>
#include <asm/system.h>
#include <asm/mmu.h>
#include <asm/pgtable.h>
#include <asm/bitops.h>
#include <asm/bootinfo.h>
#include <asm/btext.h>
#include <asm/pci-bridge.h>
#include "open_pic.h"
#ifdef CONFIG_FB
#include <asm/linux_logo.h>
#endif
/*
* Properties whose value is longer than this get excluded from our
* copy of the device tree. This way we don't waste space storing
* things like "driver,AAPL,MacOS,PowerPC" properties. But this value
* does need to be big enough to ensure that we don't lose things
* like the interrupt-map property on a PCI-PCI bridge.
*/
#define MAX_PROPERTY_LENGTH 4096
struct prom_args {
const char *service;
int nargs;
int nret;
void *args[10];
};
struct pci_address {
unsigned a_hi;
unsigned a_mid;
unsigned a_lo;
};
struct pci_reg_property {
struct pci_address addr;
unsigned size_hi;
unsigned size_lo;
};
struct pci_range {
struct pci_address addr;
unsigned phys;
unsigned size_hi;
unsigned size_lo;
};
struct isa_reg_property {
unsigned space;
unsigned address;
unsigned size;
};
struct pci_intr_map {
struct pci_address addr;
unsigned dunno;
phandle int_ctrler;
unsigned intr;
};
typedef unsigned long interpret_func(struct device_node *, unsigned long,
int, int);
static interpret_func interpret_pci_props;
static interpret_func interpret_dbdma_props;
static interpret_func interpret_isa_props;
static interpret_func interpret_macio_props;
static interpret_func interpret_root_props;
#ifndef FB_MAX /* avoid pulling in all of the fb stuff */
#define FB_MAX 8
#endif
char *prom_display_paths[FB_MAX] __initdata = { 0, };
phandle prom_display_nodes[FB_MAX] __initdata;
unsigned int prom_num_displays __initdata = 0;
char *of_stdout_device __initdata = 0;
ihandle prom_disp_node __initdata = 0;
prom_entry prom __initdata = 0;
ihandle prom_chosen __initdata = 0;
ihandle prom_stdout __initdata = 0;
extern char *klimit;
char *bootpath;
char *bootdevice;
unsigned int rtas_data; /* physical pointer */
unsigned int rtas_entry; /* physical pointer */
unsigned int rtas_size;
unsigned int old_rtas;
/* Set for a newworld or CHRP machine */
int use_of_interrupt_tree;
struct device_node *dflt_interrupt_controller;
int num_interrupt_controllers;
int pmac_newworld;
static struct device_node *allnodes;
static void *call_prom(const char *service, int nargs, int nret, ...);
static void prom_exit(void);
static unsigned long copy_device_tree(unsigned long, unsigned long);
static unsigned long inspect_node(phandle, struct device_node *, unsigned long,
unsigned long, struct device_node ***);
static unsigned long finish_node(struct device_node *, unsigned long,
interpret_func *, int, int);
static unsigned long finish_node_interrupts(struct device_node *, unsigned long);
static unsigned long check_display(unsigned long);
static int prom_next_node(phandle *);
static void *early_get_property(unsigned long, unsigned long, char *);
static struct device_node *find_phandle(phandle);
#ifdef CONFIG_BOOTX_TEXT
static void setup_disp_fake_bi(ihandle dp);
#endif
extern void enter_rtas(void *);
void phys_call_rtas(int, int, int, ...);
extern char cmd_line[512]; /* XXX */
boot_infos_t *boot_infos;
unsigned long dev_tree_size;
#define ALIGN(x) (((x) + sizeof(unsigned long)-1) & -sizeof(unsigned long))
/* Is boot-info compatible ? */
#define BOOT_INFO_IS_COMPATIBLE(bi) ((bi)->compatible_version <= BOOT_INFO_VERSION)
#define BOOT_INFO_IS_V2_COMPATIBLE(bi) ((bi)->version >= 2)
#define BOOT_INFO_IS_V4_COMPATIBLE(bi) ((bi)->version >= 4)
/*
* Note that prom_init() and anything called from prom_init() must
* use the RELOC/PTRRELOC macros to access any static data in
* memory, since the kernel may be running at an address that is
* different from the address that it was linked at.
* (Note that strings count as static variables.)
*/
static void __init
prom_exit()
{
struct prom_args args;
unsigned long offset = reloc_offset();
args.service = "exit";
args.nargs = 0;
args.nret = 0;
RELOC(prom)(&args);
for (;;) /* should never get here */
;
}
void __init
prom_enter(void)
{
struct prom_args args;
unsigned long offset = reloc_offset();
args.service = RELOC("enter");
args.nargs = 0;
args.nret = 0;
RELOC(prom)(&args);
}
static void * __init
call_prom(const char *service, int nargs, int nret, ...)
{
va_list list;
int i;
unsigned long offset = reloc_offset();
struct prom_args prom_args;
prom_args.service = service;
prom_args.nargs = nargs;
prom_args.nret = nret;
va_start(list, nret);
for (i = 0; i < nargs; ++i)
prom_args.args[i] = va_arg(list, void *);
va_end(list);
for (i = 0; i < nret; ++i)
prom_args.args[i + nargs] = 0;
RELOC(prom)(&prom_args);
return prom_args.args[nargs];
}
void __init
prom_print(const char *msg)
{
const char *p, *q;
unsigned long offset = reloc_offset();
if (RELOC(prom_stdout) == 0)
return;
for (p = msg; *p != 0; p = q) {
for (q = p; *q != 0 && *q != '\n'; ++q)
;
if (q > p)
call_prom(RELOC("write"), 3, 1, RELOC(prom_stdout),
p, q - p);
if (*q != 0) {
++q;
call_prom(RELOC("write"), 3, 1, RELOC(prom_stdout),
RELOC("\r\n"), 2);
}
}
}
static void __init
prom_print_hex(unsigned int v)
{
char buf[16];
int i, c;
for (i = 0; i < 8; ++i) {
c = (v >> ((7-i)*4)) & 0xf;
c += (c >= 10)? ('a' - 10): '0';
buf[i] = c;
}
buf[i] = ' ';
buf[i+1] = 0;
prom_print(buf);
}
unsigned long smp_chrp_cpu_nr __initdata = 0;
#ifdef CONFIG_SMP
/*
* With CHRP SMP we need to use the OF to start the other
* processors so we can't wait until smp_boot_cpus (the OF is
* trashed by then) so we have to put the processors into
* a holding pattern controlled by the kernel (not OF) before
* we destroy the OF.
*
* This uses a chunk of high memory, puts some holding pattern
* code there and sends the other processors off to there until
* smp_boot_cpus tells them to do something. We do that by using
* physical address 0x0. The holding pattern checks that address
* until its cpu # is there, when it is that cpu jumps to
* __secondary_start(). smp_boot_cpus() takes care of setting those
* values.
*
* We also use physical address 0x4 here to tell when a cpu
* is in its holding pattern code.
*
* -- Cort
*/
static void __init
prom_hold_cpus(unsigned long mem)
{
extern void __secondary_hold(void);
unsigned long i;
int cpu;
phandle node;
unsigned long offset = reloc_offset();
char type[16], *path;
unsigned int reg;
/*
* XXX: hack to make sure we're chrp, assume that if we're
* chrp we have a device_type property -- Cort
*/
node = call_prom(RELOC("finddevice"), 1, 1, RELOC("/"));
if ( (int)call_prom(RELOC("getprop"), 4, 1, node,
RELOC("device_type"),type, sizeof(type)) <= 0)
return;
/* copy the holding pattern code to someplace safe (0) */
/* the holding pattern is now within the first 0x100
bytes of the kernel image -- paulus */
memcpy((void *)0, (void *)(KERNELBASE + offset), 0x100);
flush_icache_range(0, 0x100);
/* look for cpus */
*(unsigned long *)(0x0) = 0;
asm volatile("dcbf 0,%0": : "r" (0) : "memory");
for (node = 0; prom_next_node(&node); ) {
type[0] = 0;
call_prom(RELOC("getprop"), 4, 1, node, RELOC("device_type"),
type, sizeof(type));
if (strcmp(type, RELOC("cpu")) != 0)
continue;
path = (char *) mem;
memset(path, 0, 256);
if ((int) call_prom(RELOC("package-to-path"), 3, 1,
node, path, 255) < 0)
continue;
reg = -1;
call_prom(RELOC("getprop"), 4, 1, node, RELOC("reg"),
®, sizeof(reg));
cpu = RELOC(smp_chrp_cpu_nr)++;
RELOC(smp_hw_index)[cpu] = reg;
/* XXX: hack - don't start cpu 0, this cpu -- Cort */
if (cpu == 0)
continue;
prom_print(RELOC("starting cpu "));
prom_print(path);
*(ulong *)(0x4) = 0;
call_prom(RELOC("start-cpu"), 3, 0, node,
__pa(__secondary_hold), cpu);
prom_print(RELOC("..."));
for ( i = 0 ; (i < 10000) && (*(ulong *)(0x4) == 0); i++ )
;
if (*(ulong *)(0x4) == cpu)
prom_print(RELOC("ok\n"));
else {
prom_print(RELOC("failed: "));
prom_print_hex(*(ulong *)0x4);
prom_print(RELOC("\n"));
}
}
}
#endif /* CONFIG_SMP */
void __init
bootx_init(unsigned long r4, unsigned long phys)
{
boot_infos_t *bi = (boot_infos_t *) r4;
unsigned long space;
unsigned long ptr, x;
char *model;
unsigned long offset = reloc_offset();
RELOC(boot_infos) = PTRUNRELOC(bi);
if (!BOOT_INFO_IS_V2_COMPATIBLE(bi))
bi->logicalDisplayBase = 0;
#ifdef CONFIG_BOOTX_TEXT
btext_init(bi);
/*
* Test if boot-info is compatible. Done only in config
* CONFIG_BOOTX_TEXT since there is nothing much we can do
* with an incompatible version, except display a message
* and eventually hang the processor...
*
* I'll try to keep enough of boot-info compatible in the
* future to always allow display of this message;
*/
if (!BOOT_INFO_IS_COMPATIBLE(bi)) {
btext_drawstring(RELOC(" !!! WARNING - Incompatible version of BootX !!!\n\n\n"));
btext_flushscreen();
}
#endif /* CONFIG_BOOTX_TEXT */
/* New BootX enters kernel with MMU off, i/os are not allowed
here. This hack will have been done by the boostrap anyway.
*/
if (bi->version < 4) {
/*
* XXX If this is an iMac, turn off the USB controller.
*/
model = (char *) early_get_property
(r4 + bi->deviceTreeOffset, 4, RELOC("model"));
if (model
&& (strcmp(model, RELOC("iMac,1")) == 0
|| strcmp(model, RELOC("PowerMac1,1")) == 0)) {
out_le32((unsigned *)0x80880008, 1); /* XXX */
}
}
/* Move klimit to enclose device tree, args, ramdisk, etc... */
if (bi->version < 5) {
space = bi->deviceTreeOffset + bi->deviceTreeSize;
if (bi->ramDisk)
space = bi->ramDisk + bi->ramDiskSize;
} else
space = bi->totalParamsSize;
RELOC(klimit) = PTRUNRELOC((char *) bi + space);
/* New BootX will have flushed all TLBs and enters kernel with
MMU switched OFF, so this should not be useful anymore.
*/
if (bi->version < 4) {
/*
* Touch each page to make sure the PTEs for them
* are in the hash table - the aim is to try to avoid
* getting DSI exceptions while copying the kernel image.
*/
for (ptr = (KERNELBASE + offset) & PAGE_MASK;
ptr < (unsigned long)bi + space; ptr += PAGE_SIZE)
x = *(volatile unsigned long *)ptr;
}
#ifdef CONFIG_BOOTX_TEXT
/*
* Note that after we call prepare_disp_BAT, we can't do
* prom_draw*, flushscreen or clearscreen until we turn the MMU
* on, since prepare_disp_BAT sets disp_bi->logicalDisplayBase
* to a virtual address.
*/
btext_prepare_BAT();
#endif
}
#ifdef CONFIG_PPC64BRIDGE
/*
* Set up a hash table with a set of entries in it to map the
* first 64MB of RAM. This is used on 64-bit machines since
* some of them don't have BATs.
* We assume the PTE will fit in the primary PTEG.
*/
static inline void make_pte(unsigned long htab, unsigned int hsize,
unsigned int va, unsigned int pa, int mode)
{
unsigned int *pteg;
unsigned int hash, i, vsid;
vsid = ((va >> 28) * 0x111) << 12;
hash = ((va ^ vsid) >> 5) & 0x7fff80;
pteg = (unsigned int *)(htab + (hash & (hsize - 1)));
for (i = 0; i < 8; ++i, pteg += 4) {
if ((pteg[1] & 1) == 0) {
pteg[1] = vsid | ((va >> 16) & 0xf80) | 1;
pteg[3] = pa | mode;
break;
}
}
}
extern unsigned long _SDR1;
extern PTE *Hash;
extern unsigned long Hash_size;
static void __init
prom_alloc_htab(void)
{
unsigned int hsize;
unsigned long htab;
unsigned int addr;
unsigned long offset = reloc_offset();
/*
* Because of OF bugs we can't use the "claim" client
* interface to allocate memory for the hash table.
* This code is only used on 64-bit PPCs, and the only
* 64-bit PPCs at the moment are RS/6000s, and their
* OF is based at 0xc00000 (the 12M point), so we just
* arbitrarily use the 0x800000 - 0xc00000 region for the
* hash table.
* -- paulus.
*/
#ifdef CONFIG_POWER4
hsize = 4 << 20; /* POWER4 has no BATs */
#else
hsize = 2 << 20;
#endif /* CONFIG_POWER4 */
htab = (8 << 20);
RELOC(Hash) = (void *)(htab + KERNELBASE);
RELOC(Hash_size) = hsize;
RELOC(_SDR1) = htab + __ilog2(hsize) - 18;
/*
* Put in PTEs for the first 64MB of RAM
*/
cacheable_memzero((void *)htab, hsize);
for (addr = 0; addr < 0x4000000; addr += 0x1000)
make_pte(htab, hsize, addr + KERNELBASE, addr,
_PAGE_ACCESSED | _PAGE_COHERENT | PP_RWXX);
}
#endif /* CONFIG_PPC64BRIDGE */
static void __init
prom_instantiate_rtas(void)
{
ihandle prom_rtas;
unsigned int i;
struct prom_args prom_args;
unsigned long offset = reloc_offset();
prom_rtas = call_prom(RELOC("finddevice"), 1, 1, RELOC("/rtas"));
if (prom_rtas == (void *) -1)
return;
RELOC(rtas_size) = 0;
call_prom(RELOC("getprop"), 4, 1, prom_rtas,
RELOC("rtas-size"), &RELOC(rtas_size), sizeof(rtas_size));
prom_print(RELOC("instantiating rtas"));
if (RELOC(rtas_size) == 0) {
RELOC(rtas_data) = 0;
} else {
/*
* Ask OF for some space for RTAS.
* Actually OF has bugs so we just arbitrarily
* use memory at the 6MB point.
*/
RELOC(rtas_data) = 6 << 20;
prom_print(RELOC(" at "));
prom_print_hex(RELOC(rtas_data));
}
prom_rtas = call_prom(RELOC("open"), 1, 1, RELOC("/rtas"));
prom_print(RELOC("..."));
prom_args.service = RELOC("call-method");
prom_args.nargs = 3;
prom_args.nret = 2;
prom_args.args[0] = RELOC("instantiate-rtas");
prom_args.args[1] = prom_rtas;
prom_args.args[2] = (void *) RELOC(rtas_data);
RELOC(prom)(&prom_args);
i = 0;
if (prom_args.args[3] == 0)
i = (unsigned int)prom_args.args[4];
RELOC(rtas_entry) = i;
if ((RELOC(rtas_entry) == -1) || (RELOC(rtas_entry) == 0))
prom_print(RELOC(" failed\n"));
else
prom_print(RELOC(" done\n"));
}
/*
* We enter here early on, when the Open Firmware prom is still
* handling exceptions and the MMU hash table for us.
*/
unsigned long __init
prom_init(int r3, int r4, prom_entry pp)
{
unsigned long mem;
ihandle prom_mmu;
unsigned long offset = reloc_offset();
int l;
char *p, *d;
unsigned long phys;
/* Default */
phys = offset + KERNELBASE;
/* First get a handle for the stdout device */
RELOC(prom) = pp;
RELOC(prom_chosen) = call_prom(RELOC("finddevice"), 1, 1,
RELOC("/chosen"));
if (RELOC(prom_chosen) == (void *)-1)
prom_exit();
if ((int) call_prom(RELOC("getprop"), 4, 1, RELOC(prom_chosen),
RELOC("stdout"), &RELOC(prom_stdout),
sizeof(prom_stdout)) <= 0)
prom_exit();
/* Get the full OF pathname of the stdout device */
mem = (unsigned long) RELOC(klimit) + offset;
p = (char *) mem;
memset(p, 0, 256);
call_prom(RELOC("instance-to-path"), 3, 1, RELOC(prom_stdout), p, 255);
RELOC(of_stdout_device) = PTRUNRELOC(p);
mem += strlen(p) + 1;
/* Get the boot device and translate it to a full OF pathname. */
p = (char *) mem;
l = (int) call_prom(RELOC("getprop"), 4, 1, RELOC(prom_chosen),
RELOC("bootpath"), p, 1<<20);
if (l > 0) {
p[l] = 0; /* should already be null-terminated */
RELOC(bootpath) = PTRUNRELOC(p);
mem += l + 1;
d = (char *) mem;
*d = 0;
call_prom(RELOC("canon"), 3, 1, p, d, 1<<20);
RELOC(bootdevice) = PTRUNRELOC(d);
mem = ALIGN(mem + strlen(d) + 1);
}
prom_instantiate_rtas();
#ifdef CONFIG_PPC64BRIDGE
/*
* Find out how much memory we have and allocate a
* suitably-sized hash table.
*/
prom_alloc_htab();
#endif
mem = check_display(mem);
prom_print(RELOC("copying OF device tree..."));
mem = copy_device_tree(mem, mem + (1<<20));
prom_print(RELOC("done\n"));
#ifdef CONFIG_SMP
prom_hold_cpus(mem);
#endif
RELOC(klimit) = (char *) (mem - offset);
/* If we are already running at 0xc0000000, we assume we were loaded by
* an OF bootloader which did set a BAT for us. This breaks OF translate
* so we force phys to be 0
*/
if (offset == 0)
phys = 0;
else {
if ((int) call_prom(RELOC("getprop"), 4, 1, RELOC(prom_chosen),
RELOC("mmu"), &prom_mmu, sizeof(prom_mmu)) <= 0) {
prom_print(RELOC(" no MMU found\n"));
} else {
int nargs;
struct prom_args prom_args;
nargs = 4;
prom_args.service = RELOC("call-method");
prom_args.nargs = nargs;
prom_args.nret = 4;
prom_args.args[0] = RELOC("translate");
prom_args.args[1] = prom_mmu;
prom_args.args[2] = (void *)(offset + KERNELBASE);
prom_args.args[3] = (void *)1;
RELOC(prom)(&prom_args);
/* We assume the phys. address size is 3 cells */
if (prom_args.args[nargs] != 0)
prom_print(RELOC(" (translate failed)\n"));
else
phys = (unsigned long)prom_args.args[nargs+3];
}
}
#ifdef CONFIG_BOOTX_TEXT
if (RELOC(prom_disp_node) != 0)
setup_disp_fake_bi(RELOC(prom_disp_node));
#endif
/* Use quiesce call to get OF to shut down any devices it's using */
prom_print(RELOC("Calling quiesce ...\n"));
call_prom(RELOC("quiesce"), 0, 0);
#ifdef CONFIG_BOOTX_TEXT
if (RELOC(prom_disp_node) != 0)
btext_prepare_BAT();
#endif
prom_print(RELOC("returning "));
prom_print_hex(phys);
prom_print(RELOC(" from prom_init\n"));
RELOC(prom_stdout) = 0;
return phys;
}
void phys_call_rtas(int service, int nargs, int nret, ...)
{
va_list list;
union {
unsigned long words[16];
double align;
} u;
unsigned long offset = reloc_offset();
void (*rtas)(void *, unsigned long);
int i;
u.words[0] = service;
u.words[1] = nargs;
u.words[2] = nret;
va_start(list, nret);
for (i = 0; i < nargs; ++i)
u.words[i+3] = va_arg(list, unsigned long);
va_end(list);
rtas = (void (*)(void *, unsigned long)) RELOC(rtas_entry);
rtas(&u, RELOC(rtas_data));
}
static int __init
prom_set_color(ihandle ih, int i, int r, int g, int b)
{
struct prom_args prom_args;
unsigned long offset = reloc_offset();
prom_args.service = RELOC("call-method");
prom_args.nargs = 6;
prom_args.nret = 1;
prom_args.args[0] = RELOC("color!");
prom_args.args[1] = ih;
prom_args.args[2] = (void *) i;
prom_args.args[3] = (void *) b;
prom_args.args[4] = (void *) g;
prom_args.args[5] = (void *) r;
RELOC(prom)(&prom_args);
return (int) prom_args.args[6];
}
/*
* If we have a display that we don't know how to drive,
* we will want to try to execute OF's open method for it
* later. However, OF will probably fall over if we do that
* we've taken over the MMU.
* So we check whether we will need to open the display,
* and if so, open it now.
*/
static unsigned long __init
check_display(unsigned long mem)
{
phandle node;
ihandle ih;
int i;
unsigned long offset = reloc_offset();
char type[16], *path;
static unsigned char default_colors[] = {
0x00, 0x00, 0x00,
0x00, 0x00, 0xaa,
0x00, 0xaa, 0x00,
0x00, 0xaa, 0xaa,
0xaa, 0x00, 0x00,
0xaa, 0x00, 0xaa,
0xaa, 0xaa, 0x00,
0xaa, 0xaa, 0xaa,
0x55, 0x55, 0x55,
0x55, 0x55, 0xff,
0x55, 0xff, 0x55,
0x55, 0xff, 0xff,
0xff, 0x55, 0x55,
0xff, 0x55, 0xff,
0xff, 0xff, 0x55,
0xff, 0xff, 0xff
};
RELOC(prom_disp_node) = 0;
for (node = 0; prom_next_node(&node); ) {
type[0] = 0;
call_prom(RELOC("getprop"), 4, 1, node, RELOC("device_type"),
type, sizeof(type));
if (strcmp(type, RELOC("display")) != 0)
continue;
/* It seems OF doesn't null-terminate the path :-( */
path = (char *) mem;
memset(path, 0, 256);
if ((int) call_prom(RELOC("package-to-path"), 3, 1,
node, path, 255) < 0)
continue;
/*
* If this display is the device that OF is using for stdout,
* move it to the front of the list.
*/
mem += strlen(path) + 1;
i = RELOC(prom_num_displays)++;
if (RELOC(of_stdout_device) != 0 && i > 0
&& strcmp(PTRRELOC(RELOC(of_stdout_device)), path) == 0) {
for (; i > 0; --i) {
RELOC(prom_display_paths[i])
= RELOC(prom_display_paths[i-1]);
RELOC(prom_display_nodes[i])
= RELOC(prom_display_nodes[i-1]);
}
}
RELOC(prom_display_paths[i]) = PTRUNRELOC(path);
RELOC(prom_display_nodes[i]) = node;
if (i == 0)
RELOC(prom_disp_node) = node;
if (RELOC(prom_num_displays) >= FB_MAX)
break;
}
try_again:
/*
* Open the first display and set its colormap.
*/
if (RELOC(prom_num_displays) > 0) {
path = PTRRELOC(RELOC(prom_display_paths[0]));
prom_print(RELOC("opening display "));
prom_print(path);
ih = call_prom(RELOC("open"), 1, 1, path);
if (ih == 0 || ih == (ihandle) -1) {
prom_print(RELOC("... failed\n"));
for (i=1; i<RELOC(prom_num_displays); i++) {
RELOC(prom_display_paths[i-1]) = RELOC(prom_display_paths[i]);
RELOC(prom_display_nodes[i-1]) = RELOC(prom_display_nodes[i]);
}
if (--RELOC(prom_num_displays) > 0)
RELOC(prom_disp_node) = RELOC(prom_display_nodes[0]);
else
RELOC(prom_disp_node) = NULL;
goto try_again;
} else {
prom_print(RELOC("... ok\n"));
/*
* Setup a usable color table when the appropriate
* method is available.
* Should update this to use set-colors.
*/
for (i = 0; i < 32; i++)
if (prom_set_color(ih, i, RELOC(default_colors)[i*3],
RELOC(default_colors)[i*3+1],
RELOC(default_colors)[i*3+2]) != 0)
break;
#ifdef CONFIG_FB
for (i = 0; i < LINUX_LOGO_COLORS; i++)
if (prom_set_color(ih, i + 32,
RELOC(linux_logo_red)[i],
RELOC(linux_logo_green)[i],
RELOC(linux_logo_blue)[i]) != 0)
break;
#endif /* CONFIG_FB */
}
}
return ALIGN(mem);
}
/* This function will enable the early boot text when doing OF booting. This
* way, xmon output should work too
*/
#ifdef CONFIG_BOOTX_TEXT
static void __init
setup_disp_fake_bi(ihandle dp)
{
int width = 640, height = 480, depth = 8, pitch;
unsigned address;
unsigned long offset = reloc_offset();
struct pci_reg_property addrs[8];
int i, naddrs;
char name[32];
char *getprop = RELOC("getprop");
prom_print(RELOC("Initializing fake screen: "));
memset(name, 0, sizeof(name));
call_prom(getprop, 4, 1, dp, RELOC("name"), name, sizeof(name));
name[sizeof(name)-1] = 0;
prom_print(name);
prom_print(RELOC("\n"));
call_prom(getprop, 4, 1, dp, RELOC("width"), &width, sizeof(width));
call_prom(getprop, 4, 1, dp, RELOC("height"), &height, sizeof(height));
call_prom(getprop, 4, 1, dp, RELOC("depth"), &depth, sizeof(depth));
pitch = width * ((depth + 7) / 8);
call_prom(getprop, 4, 1, dp, RELOC("linebytes"),
&pitch, sizeof(pitch));
if (pitch == 1)
pitch = 0x1000; /* for strange IBM display */
address = 0;
call_prom(getprop, 4, 1, dp, RELOC("address"),
&address, sizeof(address));
if (address == 0) {
/* look for an assigned address with a size of >= 1MB */
naddrs = (int) call_prom(getprop, 4, 1, dp,
RELOC("assigned-addresses"),
addrs, sizeof(addrs));
naddrs /= sizeof(struct pci_reg_property);
for (i = 0; i < naddrs; ++i) {
if (addrs[i].size_lo >= (1 << 20)) {
address = addrs[i].addr.a_lo;
/* use the BE aperture if possible */
if (addrs[i].size_lo >= (16 << 20))
address += (8 << 20);
break;
}
}
if (address == 0) {
prom_print(RELOC("Failed to get address\n"));
return;
}
}
/* kludge for valkyrie */
if (strcmp(name, RELOC("valkyrie")) == 0)
address += 0x1000;
btext_setup_display(width, height, depth, pitch, address);
}
#endif
static int __init
prom_next_node(phandle *nodep)
{
phandle node;
unsigned long offset = reloc_offset();
if ((node = *nodep) != 0
&& (*nodep = call_prom(RELOC("child"), 1, 1, node)) != 0)
return 1;
if ((*nodep = call_prom(RELOC("peer"), 1, 1, node)) != 0)
return 1;
for (;;) {
if ((node = call_prom(RELOC("parent"), 1, 1, node)) == 0)
return 0;
if ((*nodep = call_prom(RELOC("peer"), 1, 1, node)) != 0)
return 1;
}
}
/*
* Make a copy of the device tree from the PROM.
*/
static unsigned long __init
copy_device_tree(unsigned long mem_start, unsigned long mem_end)
{
phandle root;
unsigned long new_start;
struct device_node **allnextp;
unsigned long offset = reloc_offset();
root = call_prom(RELOC("peer"), 1, 1, (phandle)0);
if (root == (phandle)0) {
prom_print(RELOC("couldn't get device tree root\n"));
prom_exit();
}
allnextp = &RELOC(allnodes);
mem_start = ALIGN(mem_start);
new_start = inspect_node(root, 0, mem_start, mem_end, &allnextp);
*allnextp = 0;
return new_start;
}
static unsigned long __init
inspect_node(phandle node, struct device_node *dad,
unsigned long mem_start, unsigned long mem_end,
struct device_node ***allnextpp)
{
int l;
phandle child;
struct device_node *np;
struct property *pp, **prev_propp;
char *prev_name, *namep;
unsigned char *valp;
unsigned long offset = reloc_offset();
np = (struct device_node *) mem_start;
mem_start += sizeof(struct device_node);
memset(np, 0, sizeof(*np));
np->node = node;
**allnextpp = PTRUNRELOC(np);
*allnextpp = &np->allnext;
if (dad != 0) {
np->parent = PTRUNRELOC(dad);
/* we temporarily use the `next' field as `last_child'. */
if (dad->next == 0)
dad->child = PTRUNRELOC(np);
else
dad->next->sibling = PTRUNRELOC(np);
dad->next = np;
}
/* get and store all properties */
prev_propp = &np->properties;
prev_name = RELOC("");
for (;;) {
pp = (struct property *) mem_start;
namep = (char *) (pp + 1);
pp->name = PTRUNRELOC(namep);
if ((int) call_prom(RELOC("nextprop"), 3, 1, node, prev_name,
namep) <= 0)
break;
mem_start = ALIGN((unsigned long)namep + strlen(namep) + 1);
prev_name = namep;
valp = (unsigned char *) mem_start;
pp->value = PTRUNRELOC(valp);
pp->length = (int)
call_prom(RELOC("getprop"), 4, 1, node, namep,
valp, mem_end - mem_start);
if (pp->length < 0)
continue;
#ifdef MAX_PROPERTY_LENGTH
if (pp->length > MAX_PROPERTY_LENGTH)
continue; /* ignore this property */
#endif
mem_start = ALIGN(mem_start + pp->length);
*prev_propp = PTRUNRELOC(pp);
prev_propp = &pp->next;
}
if (np->node != NULL) {
/* Add a "linux,phandle" property" */
pp = (struct property *) mem_start;
*prev_propp = PTRUNRELOC(pp);
prev_propp = &pp->next;
namep = (char *) (pp + 1);
pp->name = PTRUNRELOC(namep);
strcpy(namep, RELOC("linux,phandle"));
mem_start = ALIGN((unsigned long)namep + strlen(namep) + 1);
pp->value = (unsigned char *) PTRUNRELOC(&np->node);
pp->length = sizeof(np->node);
}
*prev_propp = NULL;
/* get the node's full name */
l = (int) call_prom(RELOC("package-to-path"), 3, 1, node,
(char *) mem_start, mem_end - mem_start);
if (l >= 0) {
np->full_name = PTRUNRELOC((char *) mem_start);
*(char *)(mem_start + l) = 0;
mem_start = ALIGN(mem_start + l + 1);
}
/* do all our children */
child = call_prom(RELOC("child"), 1, 1, node);
while (child != (void *)0) {
mem_start = inspect_node(child, np, mem_start, mem_end,
allnextpp);
child = call_prom(RELOC("peer"), 1, 1, child);
}
return mem_start;
}
/*
* finish_device_tree is called once things are running normally
* (i.e. with text and data mapped to the address they were linked at).
* It traverses the device tree and fills in the name, type,
* {n_}addrs and {n_}intrs fields of each node.
*/
void __init
finish_device_tree(void)
{
unsigned long mem = (unsigned long) klimit;
struct device_node *np;
/* All newworld pmac machines and CHRPs now use the interrupt tree */
for (np = allnodes; np != NULL; np = np->allnext) {
if (get_property(np, "interrupt-parent", 0)) {
use_of_interrupt_tree = 1;
break;
}
}
if (_machine == _MACH_Pmac && use_of_interrupt_tree)
pmac_newworld = 1;
#ifdef CONFIG_BOOTX_TEXT
if (boot_infos && pmac_newworld) {
prom_print("WARNING ! BootX/miBoot booting is not supported on this machine\n");
prom_print(" You should use an Open Firmware bootloader\n");
}
#endif /* CONFIG_BOOTX_TEXT */
if (use_of_interrupt_tree) {
/*
* We want to find out here how many interrupt-controller
* nodes there are, and if we are booted from BootX,
* we need a pointer to the first (and hopefully only)
* such node. But we can't use find_devices here since
* np->name has not been set yet. -- paulus
*/
int n = 0;
char *name, *ic;
int iclen;
for (np = allnodes; np != NULL; np = np->allnext) {
ic = get_property(np, "interrupt-controller", &iclen);
name = get_property(np, "name", NULL);
/* checking iclen makes sure we don't get a false
match on /chosen.interrupt_controller */
if ((name != NULL
&& strcmp(name, "interrupt-controller") == 0)
|| (ic != NULL && iclen == 0)) {
if (n == 0)
dflt_interrupt_controller = np;
++n;
}
}
num_interrupt_controllers = n;
}
mem = finish_node(allnodes, mem, NULL, 1, 1);
dev_tree_size = mem - (unsigned long) allnodes;
klimit = (char *) mem;
}
/*
* early_get_property is used to access the device tree image prepared
* by BootX very early on, before the pointers in it have been relocated.
*/
static void * __init
early_get_property(unsigned long base, unsigned long node, char *prop)
{
struct device_node *np = (struct device_node *)(base + node);
struct property *pp;
for (pp = np->properties; pp != 0; pp = pp->next) {
pp = (struct property *) (base + (unsigned long)pp);
if (strcmp((char *)((unsigned long)pp->name + base),
prop) == 0) {
return (void *)((unsigned long)pp->value + base);
}
}
return 0;
}
static unsigned long __init
finish_node(struct device_node *np, unsigned long mem_start,
interpret_func *ifunc, int naddrc, int nsizec)
{
struct device_node *child;
int *ip;
np->name = get_property(np, "name", 0);
np->type = get_property(np, "device_type", 0);
if (!np->name)
np->name = "<NULL>";
if (!np->type)
np->type = "<NULL>";
/* get the device addresses and interrupts */
if (ifunc != NULL)
mem_start = ifunc(np, mem_start, naddrc, nsizec);
if (use_of_interrupt_tree)
mem_start = finish_node_interrupts(np, mem_start);
/* Look for #address-cells and #size-cells properties. */
ip = (int *) get_property(np, "#address-cells", 0);
if (ip != NULL)
naddrc = *ip;
ip = (int *) get_property(np, "#size-cells", 0);
if (ip != NULL)
nsizec = *ip;
/*
* The F50 sets the name to 'display' and 'compatible' to what we
* expect for the name. -- Cort
*
* But sometimes you get a 'display' name for non-OF cards, and thus
* no compatible property. And very rarely we won't have a name
* property either. -- Tom
*/
if (!strcmp(np->name, "display"))
np->name = get_property(np, "compatible", 0);
if (!np->name)
np->name = get_property(np, "name", 0);
if (np->parent == NULL)
ifunc = interpret_root_props;
else if (np->type == 0)
ifunc = NULL;
else if (!strcmp(np->type, "pci") || !strcmp(np->type, "vci"))
ifunc = interpret_pci_props;
else if (!strcmp(np->type, "dbdma"))
ifunc = interpret_dbdma_props;
else if (!strcmp(np->type, "mac-io")
|| ifunc == interpret_macio_props)
ifunc = interpret_macio_props;
else if (!strcmp(np->type, "isa"))
ifunc = interpret_isa_props;
else if (!strcmp(np->name, "uni-n"))
ifunc = interpret_root_props;
else if (!((ifunc == interpret_dbdma_props
|| ifunc == interpret_macio_props)
&& (!strcmp(np->type, "escc")
|| !strcmp(np->type, "media-bay"))))
ifunc = NULL;
/* if we were booted from BootX, convert the full name */
if (boot_infos
&& strncmp(np->full_name, "Devices:device-tree", 19) == 0) {
if (np->full_name[19] == 0) {
strcpy(np->full_name, "/");
} else if (np->full_name[19] == ':') {
char *p = np->full_name + 19;
np->full_name = p;
for (; *p; ++p)
if (*p == ':')
*p = '/';
}
}
for (child = np->child; child != NULL; child = child->sibling)
mem_start = finish_node(child, mem_start, ifunc,
naddrc, nsizec);
return mem_start;
}
/*
* Find the interrupt parent of a node.
*/
static struct device_node * __init
intr_parent(struct device_node *p)
{
phandle *parp;
parp = (phandle *) get_property(p, "interrupt-parent", NULL);
if (parp == NULL)
return p->parent;
p = find_phandle(*parp);
if (p != NULL)
return p;
/*
* On a powermac booted with BootX, we don't get to know the
* phandles for any nodes, so find_phandle will return NULL.
* Fortunately these machines only have one interrupt controller
* so there isn't in fact any ambiguity. -- paulus
*/
if (num_interrupt_controllers == 1)
p = dflt_interrupt_controller;
return p;
}
/*
* Find out the size of each entry of the interrupts property
* for a node.
*/
static int __init
prom_n_intr_cells(struct device_node *np)
{
struct device_node *p;
unsigned int *icp;
for (p = np; (p = intr_parent(p)) != NULL; ) {
icp = (unsigned int *)
get_property(p, "#interrupt-cells", NULL);
if (icp != NULL)
return *icp;
if (get_property(p, "interrupt-controller", NULL) != NULL
|| get_property(p, "interrupt-map", NULL) != NULL) {
printk("oops, node %s doesn't have #interrupt-cells\n",
p->full_name);
return 1;
}
}
printk("prom_n_intr_cells failed for %s\n", np->full_name);
return 1;
}
/*
* Map an interrupt from a device up to the platform interrupt
* descriptor.
*/
static int __init
map_interrupt(unsigned int **irq, struct device_node **ictrler,
struct device_node *np, unsigned int *ints, int nintrc)
{
struct device_node *p, *ipar;
unsigned int *imap, *imask, *ip;
int i, imaplen, match;
int newintrc, newaddrc;
unsigned int *reg;
int naddrc;
reg = (unsigned int *) get_property(np, "reg", NULL);
naddrc = prom_n_addr_cells(np);
p = intr_parent(np);
while (p != NULL) {
if (get_property(p, "interrupt-controller", NULL) != NULL)
/* this node is an interrupt controller, stop here */
break;
imap = (unsigned int *)
get_property(p, "interrupt-map", &imaplen);
if (imap == NULL) {
p = intr_parent(p);
continue;
}
imask = (unsigned int *)
get_property(p, "interrupt-map-mask", NULL);
if (imask == NULL) {
printk("oops, %s has interrupt-map but no mask\n",
p->full_name);
return 0;
}
imaplen /= sizeof(unsigned int);
match = 0;
ipar = NULL;
while (imaplen > 0 && !match) {
/* check the child-interrupt field */
match = 1;
for (i = 0; i < naddrc && match; ++i)
match = ((reg[i] ^ imap[i]) & imask[i]) == 0;
for (; i < naddrc + nintrc && match; ++i)
match = ((ints[i-naddrc] ^ imap[i]) & imask[i]) == 0;
imap += naddrc + nintrc;
imaplen -= naddrc + nintrc;
/* grab the interrupt parent */
ipar = find_phandle((phandle) *imap++);
--imaplen;
if (ipar == NULL && num_interrupt_controllers == 1)
/* cope with BootX not giving us phandles */
ipar = dflt_interrupt_controller;
if (ipar == NULL) {
printk("oops, no int parent %x in map of %s\n",
imap[-1], p->full_name);
return 0;
}
/* find the parent's # addr and intr cells */
ip = (unsigned int *)
get_property(ipar, "#interrupt-cells", NULL);
if (ip == NULL) {
printk("oops, no #interrupt-cells on %s\n",
ipar->full_name);
return 0;
}
newintrc = *ip;
ip = (unsigned int *)
get_property(ipar, "#address-cells", NULL);
newaddrc = (ip == NULL)? 0: *ip;
imap += newaddrc + newintrc;
imaplen -= newaddrc + newintrc;
}
if (imaplen < 0) {
printk("oops, error decoding int-map on %s, len=%d\n",
p->full_name, imaplen);
return 0;
}
if (!match) {
printk("oops, no match in %s int-map for %s\n",
p->full_name, np->full_name);
return 0;
}
p = ipar;
naddrc = newaddrc;
nintrc = newintrc;
ints = imap - nintrc;
reg = ints - naddrc;
}
if (p == NULL)
printk("hmmm, int tree for %s doesn't have ctrler\n",
np->full_name);
*irq = ints;
*ictrler = p;
return nintrc;
}
/*
* New version of finish_node_interrupts.
*/
static unsigned long __init
finish_node_interrupts(struct device_node *np, unsigned long mem_start)
{
unsigned int *ints;
int intlen, intrcells;
int i, j, n, offset;
unsigned int *irq;
struct device_node *ic;
ints = (unsigned int *) get_property(np, "interrupts", &intlen);
if (ints == NULL)
return mem_start;
intrcells = prom_n_intr_cells(np);
intlen /= intrcells * sizeof(unsigned int);
np->n_intrs = intlen;
np->intrs = (struct interrupt_info *) mem_start;
mem_start += intlen * sizeof(struct interrupt_info);
for (i = 0; i < intlen; ++i) {
np->intrs[i].line = 0;
np->intrs[i].sense = 1;
n = map_interrupt(&irq, &ic, np, ints, intrcells);
if (n <= 0)
continue;
offset = 0;
/*
* On a CHRP we have an 8259 which is subordinate to
* the openpic in the interrupt tree, but we want the
* openpic's interrupt numbers offsetted, not the 8259's.
* So we apply the offset if the controller is at the
* root of the interrupt tree, i.e. has no interrupt-parent.
* This doesn't cope with the general case of multiple
* cascaded interrupt controllers, but then neither will
* irq.c at the moment either. -- paulus
*/
if (num_interrupt_controllers > 1 && ic != NULL
&& get_property(ic, "interrupt-parent", NULL) == NULL)
offset = 16;
np->intrs[i].line = irq[0] + offset;
if (n > 1)
np->intrs[i].sense = irq[1];
if (n > 2) {
printk("hmmm, got %d intr cells for %s:", n,
np->full_name);
for (j = 0; j < n; ++j)
printk(" %d", irq[j]);
printk("\n");
}
ints += intrcells;
}
return mem_start;
}
/*
* When BootX makes a copy of the device tree from the MacOS
* Name Registry, it is in the format we use but all of the pointers
* are offsets from the start of the tree.
* This procedure updates the pointers.
*/
void __init
relocate_nodes(void)
{
unsigned long base;
struct device_node *np;
struct property *pp;
#define ADDBASE(x) (x = (x)? ((typeof (x))((unsigned long)(x) + base)): 0)
base = (unsigned long) boot_infos + boot_infos->deviceTreeOffset;
allnodes = (struct device_node *)(base + 4);
for (np = allnodes; np != 0; np = np->allnext) {
ADDBASE(np->full_name);
ADDBASE(np->properties);
ADDBASE(np->parent);
ADDBASE(np->child);
ADDBASE(np->sibling);
ADDBASE(np->allnext);
for (pp = np->properties; pp != 0; pp = pp->next) {
ADDBASE(pp->name);
ADDBASE(pp->value);
ADDBASE(pp->next);
}
}
}
int
prom_n_addr_cells(struct device_node* np)
{
int* ip;
do {
if (np->parent)
np = np->parent;
ip = (int *) get_property(np, "#address-cells", 0);
if (ip != NULL)
return *ip;
} while (np->parent);
/* No #address-cells property for the root node, default to 1 */
return 1;
}
int
prom_n_size_cells(struct device_node* np)
{
int* ip;
do {
if (np->parent)
np = np->parent;
ip = (int *) get_property(np, "#size-cells", 0);
if (ip != NULL)
return *ip;
} while (np->parent);
/* No #size-cells property for the root node, default to 1 */
return 1;
}
static unsigned long __init
interpret_pci_props(struct device_node *np, unsigned long mem_start,
int naddrc, int nsizec)
{
struct address_range *adr;
struct pci_reg_property *pci_addrs;
int i, l, *ip;
pci_addrs = (struct pci_reg_property *)
get_property(np, "assigned-addresses", &l);
if (pci_addrs != 0 && l >= sizeof(struct pci_reg_property)) {
i = 0;
adr = (struct address_range *) mem_start;
while ((l -= sizeof(struct pci_reg_property)) >= 0) {
/* XXX assumes PCI addresses mapped 1-1 to physical */
adr[i].space = pci_addrs[i].addr.a_hi;
adr[i].address = pci_addrs[i].addr.a_lo;
adr[i].size = pci_addrs[i].size_lo;
++i;
}
np->addrs = adr;
np->n_addrs = i;
mem_start += i * sizeof(struct address_range);
}
if (use_of_interrupt_tree)
return mem_start;
ip = (int *) get_property(np, "AAPL,interrupts", &l);
if (ip == 0 && np->parent)
ip = (int *) get_property(np->parent, "AAPL,interrupts", &l);
if (ip == 0)
ip = (int *) get_property(np, "interrupts", &l);
if (ip != 0) {
np->intrs = (struct interrupt_info *) mem_start;
np->n_intrs = l / sizeof(int);
mem_start += np->n_intrs * sizeof(struct interrupt_info);
for (i = 0; i < np->n_intrs; ++i) {
np->intrs[i].line = *ip++;
np->intrs[i].sense = 1;
}
}
return mem_start;
}
static unsigned long __init
interpret_dbdma_props(struct device_node *np, unsigned long mem_start,
int naddrc, int nsizec)
{
struct reg_property *rp;
struct address_range *adr;
unsigned long base_address;
int i, l, *ip;
struct device_node *db;
base_address = 0;
for (db = np->parent; db != NULL; db = db->parent) {
if (!strcmp(db->type, "dbdma") && db->n_addrs != 0) {
base_address = db->addrs[0].address;
break;
}
}
rp = (struct reg_property *) get_property(np, "reg", &l);
if (rp != 0 && l >= sizeof(struct reg_property)) {
i = 0;
adr = (struct address_range *) mem_start;
while ((l -= sizeof(struct reg_property)) >= 0) {
adr[i].space = 2;
adr[i].address = rp[i].address + base_address;
adr[i].size = rp[i].size;
++i;
}
np->addrs = adr;
np->n_addrs = i;
mem_start += i * sizeof(struct address_range);
}
if (use_of_interrupt_tree)
return mem_start;
ip = (int *) get_property(np, "AAPL,interrupts", &l);
if (ip == 0)
ip = (int *) get_property(np, "interrupts", &l);
if (ip != 0) {
np->intrs = (struct interrupt_info *) mem_start;
np->n_intrs = l / sizeof(int);
mem_start += np->n_intrs * sizeof(struct interrupt_info);
for (i = 0; i < np->n_intrs; ++i) {
np->intrs[i].line = *ip++;
np->intrs[i].sense = 1;
}
}
return mem_start;
}
static unsigned long __init
interpret_macio_props(struct device_node *np, unsigned long mem_start,
int naddrc, int nsizec)
{
struct reg_property *rp;
struct address_range *adr;
unsigned long base_address;
int i, l, *ip;
struct device_node *db;
base_address = 0;
for (db = np->parent; db != NULL; db = db->parent) {
if (!strcmp(db->type, "mac-io") && db->n_addrs != 0) {
base_address = db->addrs[0].address;
break;
}
}
rp = (struct reg_property *) get_property(np, "reg", &l);
if (rp != 0 && l >= sizeof(struct reg_property)) {
i = 0;
adr = (struct address_range *) mem_start;
while ((l -= sizeof(struct reg_property)) >= 0) {
adr[i].space = 2;
adr[i].address = rp[i].address + base_address;
adr[i].size = rp[i].size;
++i;
}
np->addrs = adr;
np->n_addrs = i;
mem_start += i * sizeof(struct address_range);
}
if (use_of_interrupt_tree)
return mem_start;
ip = (int *) get_property(np, "interrupts", &l);
if (ip == 0)
ip = (int *) get_property(np, "AAPL,interrupts", &l);
if (ip != 0) {
np->intrs = (struct interrupt_info *) mem_start;
np->n_intrs = l / sizeof(int);
for (i = 0; i < np->n_intrs; ++i) {
np->intrs[i].line = *ip++;
np->intrs[i].sense = 1;
}
mem_start += np->n_intrs * sizeof(struct interrupt_info);
}
return mem_start;
}
static unsigned long __init
interpret_isa_props(struct device_node *np, unsigned long mem_start,
int naddrc, int nsizec)
{
struct isa_reg_property *rp;
struct address_range *adr;
int i, l, *ip;
rp = (struct isa_reg_property *) get_property(np, "reg", &l);
if (rp != 0 && l >= sizeof(struct isa_reg_property)) {
i = 0;
adr = (struct address_range *) mem_start;
while ((l -= sizeof(struct reg_property)) >= 0) {
adr[i].space = rp[i].space;
adr[i].address = rp[i].address
+ (adr[i].space? 0: _ISA_MEM_BASE);
adr[i].size = rp[i].size;
++i;
}
np->addrs = adr;
np->n_addrs = i;
mem_start += i * sizeof(struct address_range);
}
if (use_of_interrupt_tree)
return mem_start;
ip = (int *) get_property(np, "interrupts", &l);
if (ip != 0) {
np->intrs = (struct interrupt_info *) mem_start;
np->n_intrs = l / (2 * sizeof(int));
mem_start += np->n_intrs * sizeof(struct interrupt_info);
for (i = 0; i < np->n_intrs; ++i) {
np->intrs[i].line = *ip++;
np->intrs[i].sense = *ip++;
}
}
return mem_start;
}
static unsigned long __init
interpret_root_props(struct device_node *np, unsigned long mem_start,
int naddrc, int nsizec)
{
struct address_range *adr;
int i, l, *ip;
unsigned int *rp;
int rpsize = (naddrc + nsizec) * sizeof(unsigned int);
rp = (unsigned int *) get_property(np, "reg", &l);
if (rp != 0 && l >= rpsize) {
i = 0;
adr = (struct address_range *) mem_start;
while ((l -= rpsize) >= 0) {
adr[i].space = (naddrc >= 2? rp[naddrc-2]: 2);
adr[i].address = rp[naddrc - 1];
adr[i].size = rp[naddrc + nsizec - 1];
++i;
rp += naddrc + nsizec;
}
np->addrs = adr;
np->n_addrs = i;
mem_start += i * sizeof(struct address_range);
}
if (use_of_interrupt_tree)
return mem_start;
ip = (int *) get_property(np, "AAPL,interrupts", &l);
if (ip == 0)
ip = (int *) get_property(np, "interrupts", &l);
if (ip != 0) {
np->intrs = (struct interrupt_info *) mem_start;
np->n_intrs = l / sizeof(int);
mem_start += np->n_intrs * sizeof(struct interrupt_info);
for (i = 0; i < np->n_intrs; ++i) {
np->intrs[i].line = *ip++;
np->intrs[i].sense = 1;
}
}
return mem_start;
}
/*
* Work out the sense (active-low level / active-high edge)
* of each interrupt from the device tree.
*/
void __init
prom_get_irq_senses(unsigned char *senses, int off, int max)
{
struct device_node *np;
int i, j;
/* default to level-triggered */
memset(senses, 1, max - off);
if (!use_of_interrupt_tree)
return;
for (np = allnodes; np != 0; np = np->allnext) {
for (j = 0; j < np->n_intrs; j++) {
i = np->intrs[j].line;
if (i >= off && i < max)
senses[i-off] = np->intrs[j].sense;
}
}
}
/*
* Construct and return a list of the device_nodes with a given name.
*/
struct device_node *
find_devices(const char *name)
{
struct device_node *head, **prevp, *np;
prevp = &head;
for (np = allnodes; np != 0; np = np->allnext) {
if (np->name != 0 && strcasecmp(np->name, name) == 0) {
*prevp = np;
prevp = &np->next;
}
}
*prevp = 0;
return head;
}
/*
* Construct and return a list of the device_nodes with a given type.
*/
struct device_node *
find_type_devices(const char *type)
{
struct device_node *head, **prevp, *np;
prevp = &head;
for (np = allnodes; np != 0; np = np->allnext) {
if (np->type != 0 && strcasecmp(np->type, type) == 0) {
*prevp = np;
prevp = &np->next;
}
}
*prevp = 0;
return head;
}
/*
* Returns all nodes linked together
*/
struct device_node * __openfirmware
find_all_nodes(void)
{
struct device_node *head, **prevp, *np;
prevp = &head;
for (np = allnodes; np != 0; np = np->allnext) {
*prevp = np;
prevp = &np->next;
}
*prevp = 0;
return head;
}
/* Checks if the given "compat" string matches one of the strings in
* the device's "compatible" property
*/
int
device_is_compatible(struct device_node *device, const char *compat)
{
const char* cp;
int cplen, l;
cp = (char *) get_property(device, "compatible", &cplen);
if (cp == NULL)
return 0;
while (cplen > 0) {
if (strncasecmp(cp, compat, strlen(compat)) == 0)
return 1;
l = strlen(cp) + 1;
cp += l;
cplen -= l;
}
return 0;
}
/*
* Indicates whether the root node has a given value in its
* compatible property.
*/
int
machine_is_compatible(const char *compat)
{
struct device_node *root;
root = find_path_device("/");
if (root == 0)
return 0;
return device_is_compatible(root, compat);
}
/*
* Construct and return a list of the device_nodes with a given type
* and compatible property.
*/
struct device_node *
find_compatible_devices(const char *type, const char *compat)
{
struct device_node *head, **prevp, *np;
prevp = &head;
for (np = allnodes; np != 0; np = np->allnext) {
if (type != NULL
&& !(np->type != 0 && strcasecmp(np->type, type) == 0))
continue;
if (device_is_compatible(np, compat)) {
*prevp = np;
prevp = &np->next;
}
}
*prevp = 0;
return head;
}
/*
* Find the device_node with a given full_name.
*/
struct device_node *
find_path_device(const char *path)
{
struct device_node *np;
for (np = allnodes; np != 0; np = np->allnext)
if (np->full_name != 0 && strcasecmp(np->full_name, path) == 0)
return np;
return NULL;
}
/*
* Find the device_node with a given phandle.
*/
static struct device_node * __init
find_phandle(phandle ph)
{
struct device_node *np;
for (np = allnodes; np != 0; np = np->allnext)
if (np->node == ph)
return np;
return NULL;
}
/*
* Find a property with a given name for a given node
* and return the value.
*/
unsigned char *
get_property(struct device_node *np, const char *name, int *lenp)
{
struct property *pp;
for (pp = np->properties; pp != 0; pp = pp->next)
if (pp->name != NULL && strcmp(pp->name, name) == 0) {
if (lenp != 0)
*lenp = pp->length;
return pp->value;
}
return 0;
}
/*
* Add a property to a node
*/
void __openfirmware
prom_add_property(struct device_node* np, struct property* prop)
{
struct property **next = &np->properties;
prop->next = NULL;
while (*next)
next = &(*next)->next;
*next = prop;
}
/* I quickly hacked that one, check against spec ! */
static inline unsigned long __openfirmware
bus_space_to_resource_flags(unsigned int bus_space)
{
u8 space = (bus_space >> 24) & 0xf;
if (space == 0)
space = 0x02;
if (space == 0x02)
return IORESOURCE_MEM;
else if (space == 0x01)
return IORESOURCE_IO;
else {
printk(KERN_WARNING "prom.c: bus_space_to_resource_flags(), space: %x\n",
bus_space);
return 0;
}
}
static struct resource* __openfirmware
find_parent_pci_resource(struct pci_dev* pdev, struct address_range *range)
{
unsigned long mask;
int i;
/* Check this one */
mask = bus_space_to_resource_flags(range->space);
for (i=0; i<DEVICE_COUNT_RESOURCE; i++) {
if ((pdev->resource[i].flags & mask) == mask &&
pdev->resource[i].start <= range->address &&
pdev->resource[i].end > range->address) {
if ((range->address + range->size - 1) > pdev->resource[i].end) {
/* Add better message */
printk(KERN_WARNING "PCI/OF resource overlap !\n");
return NULL;
}
break;
}
}
if (i == DEVICE_COUNT_RESOURCE)
return NULL;
return &pdev->resource[i];
}
/*
* Request an OF device resource. Currently handles child of PCI devices,
* or other nodes attached to the root node. Ultimately, put some
* link to resources in the OF node.
* WARNING: out_resource->name should be initialized before calling this
* function.
*/
struct resource* __openfirmware
request_OF_resource(struct device_node* node, int index, const char* name_postfix)
{
struct pci_dev* pcidev;
u8 pci_bus, pci_devfn;
unsigned long iomask;
struct device_node* nd;
struct resource* parent;
struct resource *res = NULL;
int nlen, plen;
if (index >= node->n_addrs)
goto fail;
/* Sanity check on bus space */
iomask = bus_space_to_resource_flags(node->addrs[index].space);
if (iomask & IORESOURCE_MEM)
parent = &iomem_resource;
else if (iomask & IORESOURCE_IO)
parent = &ioport_resource;
else
goto fail;
/* Find a PCI parent if any */
nd = node;
pcidev = NULL;
while(nd) {
if (!pci_device_from_OF_node(nd, &pci_bus, &pci_devfn))
pcidev = pci_find_slot(pci_bus, pci_devfn);
if (pcidev) break;
nd = nd->parent;
}
if (pcidev)
parent = find_parent_pci_resource(pcidev, &node->addrs[index]);
if (!parent) {
printk(KERN_WARNING "request_OF_resource(%s), parent not found\n",
node->name);
goto fail;
}
res = __request_region(parent, node->addrs[index].address, node->addrs[index].size, NULL);
if (!res)
goto fail;
nlen = strlen(node->name);
plen = name_postfix ? strlen(name_postfix) : 0;
res->name = (const char *)kmalloc(nlen+plen+1, GFP_KERNEL);
if (res->name) {
strcpy((char *)res->name, node->name);
if (plen)
strcpy((char *)res->name+nlen, name_postfix);
}
return res;
fail:
return NULL;
}
int __openfirmware
release_OF_resource(struct device_node* node, int index)
{
struct pci_dev* pcidev;
u8 pci_bus, pci_devfn;
unsigned long iomask;
struct device_node* nd;
struct resource* parent;
struct resource *res = NULL;
if (index >= node->n_addrs)
return -EINVAL;
/* Sanity check on bus space */
iomask = bus_space_to_resource_flags(node->addrs[index].space);
if (iomask & IORESOURCE_MEM)
parent = &iomem_resource;
else if (iomask & IORESOURCE_IO)
parent = &ioport_resource;
else
return -EINVAL;
/* Find a PCI parent if any */
nd = node;
pcidev = NULL;
while(nd) {
if (!pci_device_from_OF_node(nd, &pci_bus, &pci_devfn))
pcidev = pci_find_slot(pci_bus, pci_devfn);
if (pcidev) break;
nd = nd->parent;
}
if (pcidev)
parent = find_parent_pci_resource(pcidev, &node->addrs[index]);
if (!parent) {
printk(KERN_WARNING "request_OF_resource(%s), parent not found\n",
node->name);
return -ENODEV;
}
/* Find us in the parent */
res = parent->child;
while (res) {
if (res->start == node->addrs[index].address &&
res->end == (res->start + node->addrs[index].size - 1))
break;
res = res->sibling;
}
if (!res)
return -ENODEV;
if (res->name) {
kfree(res->name);
res->name = NULL;
}
release_resource(res);
kfree(res);
return 0;
}
#if 0
void __openfirmware
print_properties(struct device_node *np)
{
struct property *pp;
char *cp;
int i, n;
for (pp = np->properties; pp != 0; pp = pp->next) {
printk(KERN_INFO "%s", pp->name);
for (i = strlen(pp->name); i < 16; ++i)
printk(" ");
cp = (char *) pp->value;
for (i = pp->length; i > 0; --i, ++cp)
if ((i > 1 && (*cp < 0x20 || *cp > 0x7e))
|| (i == 1 && *cp != 0))
break;
if (i == 0 && pp->length > 1) {
/* looks like a string */
printk(" %s\n", (char *) pp->value);
} else {
/* dump it in hex */
n = pp->length;
if (n > 64)
n = 64;
if (pp->length % 4 == 0) {
unsigned int *p = (unsigned int *) pp->value;
n /= 4;
for (i = 0; i < n; ++i) {
if (i != 0 && (i % 4) == 0)
printk("\n ");
printk(" %08x", *p++);
}
} else {
unsigned char *bp = pp->value;
for (i = 0; i < n; ++i) {
if (i != 0 && (i % 16) == 0)
printk("\n ");
printk(" %02x", *bp++);
}
}
printk("\n");
if (pp->length > 64)
printk(" ... (length = %d)\n",
pp->length);
}
}
}
#endif
static spinlock_t rtas_lock = SPIN_LOCK_UNLOCKED;
/* this can be called after setup -- Cort */
int __openfirmware
call_rtas(const char *service, int nargs, int nret,
unsigned long *outputs, ...)
{
va_list list;
int i;
unsigned long s;
struct device_node *rtas;
int *tokp;
union {
unsigned long words[16];
double align;
} u;
rtas = find_devices("rtas");
if (rtas == NULL)
return -1;
tokp = (int *) get_property(rtas, service, NULL);
if (tokp == NULL) {
printk(KERN_ERR "No RTAS service called %s\n", service);
return -1;
}
u.words[0] = *tokp;
u.words[1] = nargs;
u.words[2] = nret;
va_start(list, outputs);
for (i = 0; i < nargs; ++i)
u.words[i+3] = va_arg(list, unsigned long);
va_end(list);
/* Shouldn't we enable kernel FP here ? enter_rtas will play
* with MSR_FE0|MSR_FE1|MSR_FP so I assume rtas might use
* floating points. If that's the case, then we need to make
* sure any lazy FP context is backed up
* --BenH
*/
spin_lock_irqsave(&rtas_lock, s);
enter_rtas((void *)__pa(&u));
spin_unlock_irqrestore(&rtas_lock, s);
if (nret > 1 && outputs != NULL)
for (i = 0; i < nret-1; ++i)
outputs[i] = u.words[i+nargs+4];
return u.words[nargs+3];
}
void __init
abort()
{
#ifdef CONFIG_XMON
xmon(NULL);
#endif
for (;;)
prom_exit();
}
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