GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

make sure stack resides in cache 

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1279 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Greg Watson 2003-11-15 15:09:30 +00:00
parent 78c19a11eb
commit e14d10930f
1 changed files with 25 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
src/arch/ppc/init/crt0.S.lb
View File

@ -33,40 +33,48 @@ system_reset:
#if USE_DCACHE_RAM == 1 #if USE_DCACHE_RAM == 1
#define DCACHE_RAM_END (DCACHE_RAM_BASE + DCACHE_RAM_SIZE - 1) #define DCACHE_RAM_END (DCACHE_RAM_BASE + DCACHE_RAM_SIZE - 1)
/* /*
* Setup stack in cache * Set up stack in cache. The SP must be 16-byte (4-word) aligned
* for SYSV EABI or 8-byte (2-word) aligned for PPC EABI, so we make
* it 16-byte aligned to cover both cases. Also we have to ensure that
* the first word is located within the cache.
*/ */
lis r1, DCACHE_RAM_END@ha lis r1, (DCACHE_RAM_BASE+DCACHE_RAM_SIZE)@h
addi r1, r1, DCACHE_RAM_END@l ori r1, r1, (DCACHE_RAM_BASE+DCACHE_RAM_SIZE)@l
stwu r0,-64(r1) lis r0, 0
stwu r1,-24(r1) stwu r0, -4(r1)
stwu r0, -4(r1)
stwu r0, -4(r1)
stwu r0, -4(r1)
#if 0
/* /*
* Clear stack * Clear stack
*/ */
lis r4, DCACHE_RAM_BASE@ha lis r4, DCACHE_RAM_BASE@h
addi r4, r4, DCACHE_RAM_BASE@l ori r4, r4, DCACHE_RAM_BASE@l
lis r7, DCACHE_RAM_END@ha lis r7, DCACHE_RAM_END@h
addi r7, r7, DCACHE_RAM_END@l ori r7, r7, DCACHE_RAM_END@l
lis r5, 0 lis r5, 0
1: stwx r5, 0, r4 1: stwx r5, 0, r4
addi r4, r4, 4 addi r4, r4, 4
cmp 0, 0, r4, r7 cmp 0, 0, r4, r7
ble 1b ble 1b
sync sync
#endif
/* /*
* Set up the EABI pointers, before we enter any C code * Set up the EABI pointers, before we enter any C code
*/ */
lis r13, _SDA_BASE_@ha lis r13, _SDA_BASE_@h
addi r13, r13, _SDA_BASE_@l ori r13, r13, _SDA_BASE_@l
lis r2, _SDA2_BASE_@ha lis r2, _SDA2_BASE_@h
addi r2, r2, _SDA2_BASE_@l ori r2, r2, _SDA2_BASE_@l
/* /*
* load start address into SRR0 for rfi * load start address into SRR0 for rfi
*/ */
lis r3, ppc_main@ha lis r3, ppc_main@h
addi r3, r3, ppc_main@l ori r3, r3, ppc_main@l
mtspr SRR0, r3 mtspr SRR0, r3
/* /*
@ -79,8 +87,8 @@ system_reset:
/* /*
* If something returns after rfi then die * If something returns after rfi then die
*/ */
lis r3, dead@ha lis r3, dead@h
addi r3, r3, dead@l ori r3, r3, dead@l
mtlr r3 mtlr r3
/* /*