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- First pass at s2880 support.

Browse Source 
- SMP cleanups (remove SMP only use CONFIG_SMP)
- Minor tweaks to romcc to keep it from taking forever compiling
- failover fixes
- Get a good implementation of k8_cpufixup and sizeram for the opteron


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@998 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Eric Biederman
2003-07-21 20:13:45 +00:00
parent 6d4512cdf9
commit 2c018fba95
33 changed files with 1512 additions and 268 deletions
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72
src/cpu/k8/cpufixup.c
View File

@ -2,60 +2,52 @@
#include <console/console.h>
#include <mem.h>
#include <cpu/p6/msr.h>
#define TOP_MEM 0xc001001A
#define TOP_MEM2 0xc001001D
#define IORR_FIRST 0xC0010016
#define IORR_LAST 0xC0010019
#define SYSCFG 0xC0010010
#define MTRRVARDRAMEN (1 << 20)
#include <cpu/k8/mtrr.h>
#include <device/device.h>
void k8_cpufixup(struct mem_range *mem)
{
msr_t msr;
unsigned long mmio_basek, tomk;
unsigned long i;
unsigned long ram_megabytes;
/* For now no Athlon board has significant holes in it's
* address space so just find the last memory region
* and compute the end of memory from that.
msr_t msr;
/* Except for the PCI MMIO hold just before 4GB there are no
* significant holes in the address space, so just account
* for those two and move on.
*/
for(i = 0; mem[i].sizek; i++)
;
if (i == 0)
return;
ram_megabytes = (mem[i-1].basek + mem[i-1].sizek) *1024;
mmio_basek = tomk = 0;
for(i = 0; mem[i].sizek; i++) {
unsigned long topk;
topk = mem[i].basek + mem[i].sizek;
if (tomk < topk) {
tomk = topk;
}
if ((topk < 4*1024*1024) && (mmio_basek < topk)) {
mmio_basek = topk;
}
}
if (mmio_basek > tomk) {
mmio_basek = tomk;
}
#warning "FIXME handle > 4GB of ram"
// 8 MB alignment please
ram_megabytes += 0x7fffff;
ram_megabytes &= (~0x7fffff);
// set top_mem registers to ram size
printk_spew("Setting top_mem to 0x%x\n", ram_megabytes);
msr = rdmsr(TOP_MEM);
printk_spew("TOPMEM was 0x%02x:0x%02x\n", msr.hi, msr.lo);
msr.hi = 0;
msr.lo = ram_megabytes;
/* Setup TOP_MEM */
msr.hi = mmio_basek >> 22;
msr.lo = mmio_basek << 10;
wrmsr(TOP_MEM, msr);
// I am setting this even though I won't enable it
/* Setup TOP_MEM2 */
msr.hi = tomk >> 22;
msr.lo = tomk << 12;
wrmsr(TOP_MEM2, msr);
/* zero the IORR's before we enable to prevent
* undefined side effects
* undefined side effects.
*/
msr.lo = msr.hi = 0;
for (i = IORR_FIRST; i <= IORR_LAST; i++)
for(i = IORR_FIRST; i <= IORR_LAST; i++) {
wrmsr(i, msr);
}
msr = rdmsr(SYSCFG);
printk_spew("SYSCFG was 0x%x:0x%x\n", msr.hi, msr.lo);
msr.lo |= MTRRVARDRAMEN;
msr.lo |= SYSCFG_MSR_MtrrVarDramEn | SYSCFG_MSR_TOM2En;
wrmsr(SYSCFG, msr);
msr = rdmsr(SYSCFG);
printk_spew("SYSCFG IS NOW 0x%x:0x%x\n", msr.hi, msr.lo);
}