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/*
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2000 Silicon Graphics, Inc.
* Copyright (C) 2000 by Jack Steiner (steiner@sgi.com)
*/
/*
* FPROM EFI memory descriptor build routines
*
* - Routines to build the EFI memory descriptor map
* - Should also be usable by the SGI SN1 prom to convert
* klconfig to efi_memmap
*/
#include <asm/efi.h>
#include "fpmem.h"
/*
* args points to a layout in memory like this
*
* 32 bit 32 bit
*
* numnodes numcpus
*
* 16 bit 16 bit 32 bit
* nasid0 cpuconf membankdesc0
* nasid1 cpuconf membankdesc1
* .
* .
* .
* .
* .
*/
sn_memmap_t *sn_memmap ;
sn_config_t *sn_config ;
/*
* There is a hole in the node 0 address space. Dont put it
* in the memory map
*/
#define NODE0_HOLE_SIZE (20*MB)
#define NODE0_HOLE_END (4UL*GB)
#define MB (1024*1024)
#define GB (1024*MB)
#define KERNEL_SIZE (4*MB)
#define PROMRESERVED_SIZE (1*MB)
#define MD_BANK_SHFT 30
#define TO_NODE(_n, _x) (((long)_n<<33L) | (long)_x)
/*
* For SN, this may not take an arg and gets the numnodes from
* the prom variable or by traversing klcfg or promcfg
*/
int
GetNumNodes(void)
{
return sn_config->nodes;
}
int
GetNumCpus(void)
{
return sn_config->cpus;
}
/* For SN1, get the index th nasid */
int
GetNasid(int index)
{
return sn_memmap[index].nasid ;
}
node_memmap_t
GetMemBankInfo(int index)
{
return sn_memmap[index].node_memmap ;
}
int
IsCpuPresent(int cnode, int cpu)
{
return sn_memmap[cnode].cpuconfig & (1<<cpu);
}
/*
* Made this into an explicit case statement so that
* we can assign specific properties to banks like bank0
* actually disabled etc.
*/
int
IsBankPresent(int index, node_memmap_t nmemmap)
{
switch (index) {
case 0:return nmemmap.b0;
case 1:return nmemmap.b1;
case 2:return nmemmap.b2;
case 3:return nmemmap.b3;
case 4:return nmemmap.b4;
case 5:return nmemmap.b5;
case 6:return nmemmap.b6;
case 7:return nmemmap.b7;
default:return -1 ;
}
}
int
GetBankSize(int index, node_memmap_t nmemmap)
{
switch (index) {
case 0:
case 1:return nmemmap.b01size;
case 2:
case 3:return nmemmap.b23size;
case 4:
case 5:return nmemmap.b45size;
case 6:
case 7:return nmemmap.b67size;
default:return -1 ;
}
}
void
build_mem_desc(efi_memory_desc_t *md, int type, long paddr, long numbytes)
{
md->type = type;
md->phys_addr = paddr;
md->virt_addr = 0;
md->num_pages = numbytes >> 12;
md->attribute = EFI_MEMORY_WB;
}
int
build_efi_memmap(void *md, int mdsize)
{
int numnodes = GetNumNodes() ;
int cnode,bank ;
int nasid ;
node_memmap_t membank_info ;
int bsize;
int count = 0 ;
long paddr, hole, numbytes;
for (cnode=0;cnode<numnodes;cnode++) {
nasid = GetNasid(cnode) ;
membank_info = GetMemBankInfo(cnode) ;
for (bank=0;bank<SN1_MAX_BANK_PER_NODE;bank++) {
if (IsBankPresent(bank, membank_info)) {
bsize = GetBankSize(bank, membank_info) ;
paddr = TO_NODE(nasid, (long)bank<<MD_BANK_SHFT);
numbytes = BankSizeBytes(bsize);
/*
* Check for the node 0 hole. Since banks cant
* span the hole, we only need to check if the end of
* the range is the end of the hole.
*/
if (paddr+numbytes == NODE0_HOLE_END)
numbytes -= NODE0_HOLE_SIZE;
/*
* UGLY hack - we must skip overr the kernel and
* PROM runtime services but we dont exactly where it is.
* So lets just reserve 0-12MB.
*/
if (bank == 0) {
hole = (cnode == 0) ? KERNEL_SIZE : PROMRESERVED_SIZE;
numbytes -= hole;
build_mem_desc(md, EFI_RUNTIME_SERVICES_DATA, paddr, hole);
paddr += hole;
count++ ;
md += mdsize;
}
build_mem_desc(md, EFI_CONVENTIONAL_MEMORY, paddr, numbytes);
md += mdsize ;
count++ ;
}
}
}
return count ;
}
void
build_init(unsigned long args)
{
sn_config = (sn_config_t *) (args);
sn_memmap = (sn_memmap_t *)(args + 8) ; /* SN equiv for this is */
/* init to klconfig start */
}
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