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/*
* linux/arch/alpha/kernel/core_tsunami.c
*
* Based on code written by David A. Rusling (david.rusling@reo.mts.dec.com).
*
* Code common to all TSUNAMI core logic chips.
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <asm/ptrace.h>
#include <asm/system.h>
#include <asm/smp.h>
#define __EXTERN_INLINE inline
#include <asm/io.h>
#include <asm/core_tsunami.h>
#undef __EXTERN_INLINE
#include <linux/bootmem.h>
#include "proto.h"
#include "pci_impl.h"
static struct
{
unsigned long wsba[4];
unsigned long wsm[4];
unsigned long tba[4];
} saved_pchip[2];
/*
* NOTE: Herein lie back-to-back mb instructions. They are magic.
* One plausible explanation is that the I/O controller does not properly
* handle the system transaction. Another involves timing. Ho hum.
*/
/*
* BIOS32-style PCI interface:
*/
#define DEBUG_MCHECK 0 /* 0 = minimal, 1 = debug, 2 = debug+dump. */
#define DEBUG_CONFIG 0
#if DEBUG_CONFIG
# define DBG_CFG(args) printk args
#else
# define DBG_CFG(args)
#endif
/*
* Given a bus, device, and function number, compute resulting
* configuration space address
* accordingly. It is therefore not safe to have concurrent
* invocations to configuration space access routines, but there
* really shouldn't be any need for this.
*
* Note that all config space accesses use Type 1 address format.
*
* Note also that type 1 is determined by non-zero bus number.
*
* Type 1:
*
* 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
* 3 2|1 0 9 8|7 6 5 4|3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | | | | | | | | | | |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|1|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* 31:24 reserved
* 23:16 bus number (8 bits = 128 possible buses)
* 15:11 Device number (5 bits)
* 10:8 function number
* 7:2 register number
*
* Notes:
* The function number selects which function of a multi-function device
* (e.g., SCSI and Ethernet).
*
* The register selects a DWORD (32 bit) register offset. Hence it
* doesn't get shifted by 2 bits as we want to "drop" the bottom two
* bits.
*/
static int
mk_conf_addr(struct pci_dev *dev, int where, unsigned long *pci_addr,
unsigned char *type1)
{
struct pci_controller *hose = dev->sysdata;
unsigned long addr;
u8 bus = dev->bus->number;
u8 device_fn = dev->devfn;
DBG_CFG(("mk_conf_addr(bus=%d ,device_fn=0x%x, where=0x%x, "
"pci_addr=0x%p, type1=0x%p)\n",
bus, device_fn, where, pci_addr, type1));
if (hose->first_busno == dev->bus->number)
bus = 0;
*type1 = (bus != 0);
addr = (bus << 16) | (device_fn << 8) | where;
addr |= hose->config_space_base;
*pci_addr = addr;
DBG_CFG(("mk_conf_addr: returning pci_addr 0x%lx\n", addr));
return 0;
}
static int
tsunami_read_config_byte(struct pci_dev *dev, int where, u8 *value)
{
unsigned long addr;
unsigned char type1;
if (mk_conf_addr(dev, where, &addr, &type1))
return PCIBIOS_DEVICE_NOT_FOUND;
*value = __kernel_ldbu(*(vucp)addr);
return PCIBIOS_SUCCESSFUL;
}
static int
tsunami_read_config_word(struct pci_dev *dev, int where, u16 *value)
{
unsigned long addr;
unsigned char type1;
if (mk_conf_addr(dev, where, &addr, &type1))
return PCIBIOS_DEVICE_NOT_FOUND;
*value = __kernel_ldwu(*(vusp)addr);
return PCIBIOS_SUCCESSFUL;
}
static int
tsunami_read_config_dword(struct pci_dev *dev, int where, u32 *value)
{
unsigned long addr;
unsigned char type1;
if (mk_conf_addr(dev, where, &addr, &type1))
return PCIBIOS_DEVICE_NOT_FOUND;
*value = *(vuip)addr;
return PCIBIOS_SUCCESSFUL;
}
static int
tsunami_write_config_byte(struct pci_dev *dev, int where, u8 value)
{
unsigned long addr;
unsigned char type1;
if (mk_conf_addr(dev, where, &addr, &type1))
return PCIBIOS_DEVICE_NOT_FOUND;
__kernel_stb(value, *(vucp)addr);
mb();
__kernel_ldbu(*(vucp)addr);
return PCIBIOS_SUCCESSFUL;
}
static int
tsunami_write_config_word(struct pci_dev *dev, int where, u16 value)
{
unsigned long addr;
unsigned char type1;
if (mk_conf_addr(dev, where, &addr, &type1))
return PCIBIOS_DEVICE_NOT_FOUND;
__kernel_stw(value, *(vusp)addr);
mb();
__kernel_ldwu(*(vusp)addr);
return PCIBIOS_SUCCESSFUL;
}
static int
tsunami_write_config_dword(struct pci_dev *dev, int where, u32 value)
{
unsigned long addr;
unsigned char type1;
if (mk_conf_addr(dev, where, &addr, &type1))
return PCIBIOS_DEVICE_NOT_FOUND;
*(vuip)addr = value;
mb();
*(vuip)addr;
return PCIBIOS_SUCCESSFUL;
}
struct pci_ops tsunami_pci_ops =
{
read_byte: tsunami_read_config_byte,
read_word: tsunami_read_config_word,
read_dword: tsunami_read_config_dword,
write_byte: tsunami_write_config_byte,
write_word: tsunami_write_config_word,
write_dword: tsunami_write_config_dword
};
void
tsunami_pci_tbi(struct pci_controller *hose, dma_addr_t start, dma_addr_t end)
{
tsunami_pchip *pchip = hose->index ? TSUNAMI_pchip1 : TSUNAMI_pchip0;
volatile unsigned long *csr;
unsigned long value;
/* We can invalidate up to 8 tlb entries in a go. The flush
matches against <31:16> in the pci address. */
csr = &pchip->tlbia.csr;
if (((start ^ end) & 0xffff0000) == 0)
csr = &pchip->tlbiv.csr;
/* For TBIA, it doesn't matter what value we write. For TBI,
it's the shifted tag bits. */
value = (start & 0xffff0000) >> 12;
*csr = value;
mb();
*csr;
}
#ifdef NXM_MACHINE_CHECKS_ON_TSUNAMI
static long __init
tsunami_probe_read(volatile unsigned long *vaddr)
{
long dont_care, probe_result;
int cpu = smp_processor_id();
int s = swpipl(IPL_MCHECK - 1);
mcheck_taken(cpu) = 0;
mcheck_expected(cpu) = 1;
mb();
dont_care = *vaddr;
draina();
mcheck_expected(cpu) = 0;
probe_result = !mcheck_taken(cpu);
mcheck_taken(cpu) = 0;
setipl(s);
printk("dont_care == 0x%lx\n", dont_care);
return probe_result;
}
static long __init
tsunami_probe_write(volatile unsigned long *vaddr)
{
long true_contents, probe_result = 1;
TSUNAMI_cchip->misc.csr |= (1L << 28); /* clear NXM... */
true_contents = *vaddr;
*vaddr = 0;
draina();
if (TSUNAMI_cchip->misc.csr & (1L << 28)) {
int source = (TSUNAMI_cchip->misc.csr >> 29) & 7;
TSUNAMI_cchip->misc.csr |= (1L << 28); /* ...and unlock NXS. */
probe_result = 0;
printk("tsunami_probe_write: unit %d at 0x%016lx\n", source,
(unsigned long)vaddr);
}
if (probe_result)
*vaddr = true_contents;
return probe_result;
}
#else
#define tsunami_probe_read(ADDR) 1
#endif /* NXM_MACHINE_CHECKS_ON_TSUNAMI */
#define FN __FUNCTION__
static void __init
tsunami_init_one_pchip(tsunami_pchip *pchip, int index)
{
struct pci_controller *hose;
if (tsunami_probe_read(&pchip->pctl.csr) == 0)
return;
hose = alloc_pci_controller();
if (index == 0)
pci_isa_hose = hose;
hose->io_space = alloc_resource();
hose->mem_space = alloc_resource();
/* This is for userland consumption. For some reason, the 40-bit
PIO bias that we use in the kernel through KSEG didn't work for
the page table based user mappings. So make sure we get the
43-bit PIO bias. */
hose->sparse_mem_base = 0;
hose->sparse_io_base = 0;
hose->dense_mem_base
= (TSUNAMI_MEM(index) & 0xffffffffff) | 0x80000000000;
hose->dense_io_base
= (TSUNAMI_IO(index) & 0xffffffffff) | 0x80000000000;
hose->config_space_base = TSUNAMI_CONF(index);
hose->index = index;
hose->io_space->start = TSUNAMI_IO(index) - TSUNAMI_IO_BIAS;
hose->io_space->end = hose->io_space->start + TSUNAMI_IO_SPACE - 1;
hose->io_space->name = pci_io_names[index];
hose->io_space->flags = IORESOURCE_IO;
hose->mem_space->start = TSUNAMI_MEM(index) - TSUNAMI_MEM_BIAS;
hose->mem_space->end = hose->mem_space->start + 0xffffffff;
hose->mem_space->name = pci_mem_names[index];
hose->mem_space->flags = IORESOURCE_MEM;
if (request_resource(&ioport_resource, hose->io_space) < 0)
printk(KERN_ERR "Failed to request IO on hose %d\n", index);
if (request_resource(&iomem_resource, hose->mem_space) < 0)
printk(KERN_ERR "Failed to request MEM on hose %d\n", index);
/*
* Save the existing PCI window translations. SRM will
* need them when we go to reboot.
*/
saved_pchip[index].wsba[0] = pchip->wsba[0].csr;
saved_pchip[index].wsm[0] = pchip->wsm[0].csr;
saved_pchip[index].tba[0] = pchip->tba[0].csr;
saved_pchip[index].wsba[1] = pchip->wsba[1].csr;
saved_pchip[index].wsm[1] = pchip->wsm[1].csr;
saved_pchip[index].tba[1] = pchip->tba[1].csr;
saved_pchip[index].wsba[2] = pchip->wsba[2].csr;
saved_pchip[index].wsm[2] = pchip->wsm[2].csr;
saved_pchip[index].tba[2] = pchip->tba[2].csr;
saved_pchip[index].wsba[3] = pchip->wsba[3].csr;
saved_pchip[index].wsm[3] = pchip->wsm[3].csr;
saved_pchip[index].tba[3] = pchip->tba[3].csr;
/*
* Set up the PCI to main memory translation windows.
*
* Note: Window 3 is scatter-gather only
*
* Window 0 is scatter-gather 8MB at 8MB (for isa)
* Window 1 is scatter-gather (up to) 1GB at 1GB
* Window 2 is direct access 2GB at 2GB
*/
hose->sg_isa = iommu_arena_new(hose, 0x00800000, 0x00800000, 0);
hose->sg_pci = iommu_arena_new(hose, 0x40000000,
size_for_memory(0x40000000), 0);
__direct_map_base = 0x80000000;
__direct_map_size = 0x80000000;
pchip->wsba[0].csr = hose->sg_isa->dma_base | 3;
pchip->wsm[0].csr = (hose->sg_isa->size - 1) & 0xfff00000;
pchip->tba[0].csr = virt_to_phys(hose->sg_isa->ptes);
pchip->wsba[1].csr = hose->sg_pci->dma_base | 3;
pchip->wsm[1].csr = (hose->sg_pci->size - 1) & 0xfff00000;
pchip->tba[1].csr = virt_to_phys(hose->sg_pci->ptes);
pchip->wsba[2].csr = 0x80000000 | 1;
pchip->wsm[2].csr = (0x80000000 - 1) & 0xfff00000;
pchip->tba[2].csr = 0;
pchip->wsba[3].csr = 0;
/* Enable the Monster Window to make DAC pci64 possible. */
pchip->pctl.csr |= pctl_m_mwin;
tsunami_pci_tbi(hose, 0, -1);
}
void __init
tsunami_init_arch(void)
{
#ifdef NXM_MACHINE_CHECKS_ON_TSUNAMI
extern asmlinkage void entInt(void);
unsigned long tmp;
/* Ho hum.. init_arch is called before init_IRQ, but we need to be
able to handle machine checks. So install the handler now. */
wrent(entInt, 0);
/* NXMs just don't matter to Tsunami--unless they make it
choke completely. */
tmp = (unsigned long)(TSUNAMI_cchip - 1);
printk("%s: probing bogus address: 0x%016lx\n", FN, bogus_addr);
printk("\tprobe %s\n",
tsunami_probe_write((unsigned long *)bogus_addr)
? "succeeded" : "failed");
#endif /* NXM_MACHINE_CHECKS_ON_TSUNAMI */
#if 0
printk("%s: CChip registers:\n", FN);
printk("%s: CSR_CSC 0x%lx\n", FN, TSUNAMI_cchip->csc.csr);
printk("%s: CSR_MTR 0x%lx\n", FN, TSUNAMI_cchip.mtr.csr);
printk("%s: CSR_MISC 0x%lx\n", FN, TSUNAMI_cchip->misc.csr);
printk("%s: CSR_DIM0 0x%lx\n", FN, TSUNAMI_cchip->dim0.csr);
printk("%s: CSR_DIM1 0x%lx\n", FN, TSUNAMI_cchip->dim1.csr);
printk("%s: CSR_DIR0 0x%lx\n", FN, TSUNAMI_cchip->dir0.csr);
printk("%s: CSR_DIR1 0x%lx\n", FN, TSUNAMI_cchip->dir1.csr);
printk("%s: CSR_DRIR 0x%lx\n", FN, TSUNAMI_cchip->drir.csr);
printk("%s: DChip registers:\n");
printk("%s: CSR_DSC 0x%lx\n", FN, TSUNAMI_dchip->dsc.csr);
printk("%s: CSR_STR 0x%lx\n", FN, TSUNAMI_dchip->str.csr);
printk("%s: CSR_DREV 0x%lx\n", FN, TSUNAMI_dchip->drev.csr);
#endif
/* With multiple PCI busses, we play with I/O as physical addrs. */
ioport_resource.end = ~0UL;
iomem_resource.end = ~0UL;
/* Find how many hoses we have, and initialize them. TSUNAMI
and TYPHOON can have 2, but might only have 1 (DS10). */
tsunami_init_one_pchip(TSUNAMI_pchip0, 0);
if (TSUNAMI_cchip->csc.csr & 1L<<14)
tsunami_init_one_pchip(TSUNAMI_pchip1, 1);
}
static void
tsunami_kill_one_pchip(tsunami_pchip *pchip, int index)
{
pchip->wsba[0].csr = saved_pchip[index].wsba[0];
pchip->wsm[0].csr = saved_pchip[index].wsm[0];
pchip->tba[0].csr = saved_pchip[index].tba[0];
pchip->wsba[1].csr = saved_pchip[index].wsba[1];
pchip->wsm[1].csr = saved_pchip[index].wsm[1];
pchip->tba[1].csr = saved_pchip[index].tba[1];
pchip->wsba[2].csr = saved_pchip[index].wsba[2];
pchip->wsm[2].csr = saved_pchip[index].wsm[2];
pchip->tba[2].csr = saved_pchip[index].tba[2];
pchip->wsba[3].csr = saved_pchip[index].wsba[3];
pchip->wsm[3].csr = saved_pchip[index].wsm[3];
pchip->tba[3].csr = saved_pchip[index].tba[3];
}
void
tsunami_kill_arch(int mode)
{
tsunami_kill_one_pchip(TSUNAMI_pchip0, 0);
if (TSUNAMI_cchip->csc.csr & 1L<<14)
tsunami_kill_one_pchip(TSUNAMI_pchip1, 1);
}
static inline void
tsunami_pci_clr_err_1(tsunami_pchip *pchip)
{
pchip->perror.csr;
pchip->perror.csr = 0x040;
mb();
pchip->perror.csr;
}
static inline void
tsunami_pci_clr_err(void)
{
tsunami_pci_clr_err_1(TSUNAMI_pchip0);
/* TSUNAMI and TYPHOON can have 2, but might only have 1 (DS10) */
if (TSUNAMI_cchip->csc.csr & 1L<<14)
tsunami_pci_clr_err_1(TSUNAMI_pchip1);
}
void
tsunami_machine_check(unsigned long vector, unsigned long la_ptr,
struct pt_regs * regs)
{
/* Clear error before any reporting. */
mb();
mb(); /* magic */
draina();
tsunami_pci_clr_err();
wrmces(0x7);
mb();
process_mcheck_info(vector, la_ptr, regs, "TSUNAMI",
mcheck_expected(smp_processor_id()));
}
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