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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2017-07-13 14:11:52 +0300 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2017-08-22 20:25:15 +0000 |
| commit | 14382453349f0ca1c11870ed10f8e7fd839851cc (patch) | |
| tree | 15b11d650d02aa7d7195b53fbda460d7ec0d3905 /src/cpu | |
| parent | 90e07b460cffb4fbfee336a2b614cb8d08e4bfaa (diff) | |
| download | coreboot-14382453349f0ca1c11870ed10f8e7fd839851cc.tar.xz | |
AMD K8 fam10-15: Tidy up CAR stack switch
Return to empty stack before making the switch.
Change-Id: I6d6f633933fac5bc08d9542c371715f737fb42cf
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/20574
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/amd/car/cache_as_ram.inc | 13 | ||||
| -rw-r--r-- | src/cpu/amd/car/post_cache_as_ram.c | 8 |
2 files changed, 6 insertions, 15 deletions
diff --git a/src/cpu/amd/car/cache_as_ram.inc b/src/cpu/amd/car/cache_as_ram.inc index 4d70c9e6bc..6161048b29 100644 --- a/src/cpu/amd/car/cache_as_ram.inc +++ b/src/cpu/amd/car/cache_as_ram.inc @@ -599,21 +599,14 @@ CAR_FAM10_ap_out: call cache_as_ram_main call post_cache_as_ram + movl %eax, %esp + + call cache_as_ram_new_stack /* We will not go back. */ post_code(0xaf) /* Should never see this POST code. */ - .globl cache_as_ram_switch_stack - -cache_as_ram_switch_stack: - /* Return address. */ - popl %eax - /* New stack. */ - popl %eax - movl %eax, %esp - call cache_as_ram_new_stack - all_mtrr_msrs: /* fixed MTRR MSRs */ .long MTRR_FIX_64K_00000 diff --git a/src/cpu/amd/car/post_cache_as_ram.c b/src/cpu/amd/car/post_cache_as_ram.c index c647254c70..d51e431560 100644 --- a/src/cpu/amd/car/post_cache_as_ram.c +++ b/src/cpu/amd/car/post_cache_as_ram.c @@ -125,7 +125,7 @@ static void vErrata343(void) wrmsr(BU_CFG2_MSR, msr); } -void post_cache_as_ram(void) +asmlinkage void * post_cache_as_ram(void) { uint32_t family = amd_fam1x_cpu_family(); @@ -171,12 +171,10 @@ void post_cache_as_ram(void) /* New stack grows right below migrated_car. */ print_car_debug("Switching to use RAM as stack..."); - cache_as_ram_switch_stack(migrated_car); - - /* We do not come back. */ + return migrated_car; } -void cache_as_ram_new_stack(void) +asmlinkage void cache_as_ram_new_stack(void) { print_car_debug("Disabling cache as RAM now\n"); disable_cache_as_ram_real(0); // inline |