diff options
| author | Felix Held <felix.held@amd.corp-partner.google.com> | 2020-04-04 02:48:03 +0200 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-05-01 06:28:40 +0000 |
| commit | d149f1db69c9ddde793889931ce8fef931d13cd8 (patch) | |
| tree | 5918951f3b8d9653904523045ed86dababb80558 /src/soc/amd/picasso | |
| parent | 30322785c446a20bce98e0591eb8fcf0023dcb53 (diff) | |
soc/amd/picasso: Enable cache in bootblock
Unlike prior AMD devices, picasso cannot rely on the cache-as-RAM
setup code to properly enable MTRRs. Add that capability to the
bootblock_c_entry() function. In addition, enable an MTRR to cache
(WP) the flash boot device and another for WB of the non-XIP bootblock
running in DRAM.
BUG=b:147042464
TEST=Boot trembyle to payload and make sure bootblock isn't abnormally
slow.
Change-Id: I5615ff60ca196e622a939b46276a4a0940076ebe
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38691
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/amd/picasso')
| -rw-r--r-- | src/soc/amd/picasso/bootblock/bootblock.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/soc/amd/picasso/bootblock/bootblock.c b/src/soc/amd/picasso/bootblock/bootblock.c index 8ae4db3178..6a0fd85078 100644 --- a/src/soc/amd/picasso/bootblock/bootblock.c +++ b/src/soc/amd/picasso/bootblock/bootblock.c @@ -2,14 +2,47 @@ /* This file is part of the coreboot project. */ #include <stdint.h> +#include <symbols.h> #include <bootblock_common.h> #include <console/console.h> +#include <cpu/x86/cache.h> +#include <cpu/x86/msr.h> +#include <cpu/amd/msr.h> +#include <cpu/x86/mtrr.h> +#include <cpu/amd/mtrr.h> #include <soc/southbridge.h> #include <soc/i2c.h> #include <amdblocks/amd_pci_mmconf.h> +static void set_caching(void) +{ + msr_t deftype = {0, 0}; + int mtrr; + + /* Disable fixed and variable MTRRs while we setup */ + wrmsr(MTRR_DEF_TYPE_MSR, deftype); + + clear_all_var_mtrr(); + + mtrr = get_free_var_mtrr(); + if (mtrr >= 0) + set_var_mtrr(mtrr, FLASH_BASE_ADDR, CONFIG_ROM_SIZE, MTRR_TYPE_WRPROT); + + mtrr = get_free_var_mtrr(); + if (mtrr >= 0) + set_var_mtrr(mtrr, (unsigned int)_bootblock, REGION_SIZE(bootblock), + MTRR_TYPE_WRBACK); + + /* Enable variable MTRRs. Fixed MTRRs are left disabled since they are not used. */ + deftype.lo |= MTRR_DEF_TYPE_EN | MTRR_TYPE_UNCACHEABLE; + wrmsr(MTRR_DEF_TYPE_MSR, deftype); + + enable_cache(); +} + asmlinkage void bootblock_c_entry(uint64_t base_timestamp) { + set_caching(); enable_pci_mmconf(); bootblock_main_with_basetime(base_timestamp); |