diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/amd/cezanne/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/soc/amd/cezanne/bootblock.c | 79 | ||||
| -rw-r--r-- | src/soc/amd/cezanne/include/soc/iomap.h | 3 |
3 files changed, 84 insertions, 0 deletions
diff --git a/src/soc/amd/cezanne/Makefile.inc b/src/soc/amd/cezanne/Makefile.inc index 353bdbe891..2852b6a652 100644 --- a/src/soc/amd/cezanne/Makefile.inc +++ b/src/soc/amd/cezanne/Makefile.inc @@ -2,6 +2,8 @@ ifeq ($(CONFIG_SOC_AMD_CEZANNE),y) +subdirs-y += ../../../cpu/x86/mtrr + # Beware that all-y also adds the compilation unit to verstage on PSP all-y += config.c diff --git a/src/soc/amd/cezanne/bootblock.c b/src/soc/amd/cezanne/bootblock.c index 9fb99bdca2..d1479da6f4 100644 --- a/src/soc/amd/cezanne/bootblock.c +++ b/src/soc/amd/cezanne/bootblock.c @@ -3,12 +3,91 @@ #include <amdblocks/amd_pci_mmconf.h> #include <bootblock_common.h> #include <console/console.h> +#include <cpu/amd/mtrr.h> +#include <cpu/x86/cache.h> +#include <cpu/x86/msr.h> +#include <cpu/x86/mtrr.h> #include <cpu/x86/tsc.h> +#include <soc/iomap.h> #include <soc/southbridge.h> #include <stdint.h> +/* + * PSP performs the memory training and setting up DRAM map prior to x86 cores being released. + * Honor TOP_MEM and set up caching from 0 til TOP_MEM. Likewise, route lower memory addresses + * covered by fixed MTRRs to DRAM except for 0xa0000-0xc0000. + */ +static void set_caching(void) +{ + msr_t top_mem; + msr_t sys_cfg; + msr_t mtrr_def_type; + msr_t fixed_mtrr_ram; + msr_t fixed_mtrr_mmio; + struct var_mtrr_context mtrr_ctx; + + var_mtrr_context_init(&mtrr_ctx, NULL); + top_mem = rdmsr(TOP_MEM); + /* Enable RdDram and WrDram attributes in fixed MTRRs. */ + sys_cfg = rdmsr(SYSCFG_MSR); + sys_cfg.lo |= SYSCFG_MSR_MtrrFixDramModEn; + + /* Fixed MTRR constants. */ + fixed_mtrr_ram.lo = fixed_mtrr_ram.hi = + ((MTRR_TYPE_WRBACK | MTRR_READ_MEM | MTRR_WRITE_MEM) << 0) | + ((MTRR_TYPE_WRBACK | MTRR_READ_MEM | MTRR_WRITE_MEM) << 8) | + ((MTRR_TYPE_WRBACK | MTRR_READ_MEM | MTRR_WRITE_MEM) << 16) | + ((MTRR_TYPE_WRBACK | MTRR_READ_MEM | MTRR_WRITE_MEM) << 24); + fixed_mtrr_mmio.lo = fixed_mtrr_mmio.hi = + ((MTRR_TYPE_UNCACHEABLE) << 0) | + ((MTRR_TYPE_UNCACHEABLE) << 8) | + ((MTRR_TYPE_UNCACHEABLE) << 16) | + ((MTRR_TYPE_UNCACHEABLE) << 24); + + /* Prep default MTRR type. */ + mtrr_def_type = rdmsr(MTRR_DEF_TYPE_MSR); + mtrr_def_type.lo &= ~MTRR_DEF_TYPE_MASK; + mtrr_def_type.lo |= MTRR_TYPE_UNCACHEABLE; + mtrr_def_type.lo |= MTRR_DEF_TYPE_EN | MTRR_DEF_TYPE_FIX_EN; + + disable_cache(); + + wrmsr(SYSCFG_MSR, sys_cfg); + + clear_all_var_mtrr(); + + var_mtrr_set(&mtrr_ctx, 0, ALIGN_DOWN(top_mem.lo, 8*MiB), MTRR_TYPE_WRBACK); + /* TODO: check if we should always mark 16 MByte below 4 GByte as WRPROT */ + var_mtrr_set(&mtrr_ctx, FLASH_BASE_ADDR, CONFIG_ROM_SIZE, MTRR_TYPE_WRPROT); + + /* Set up RAM caching for everything below 1MiB except for 0xa0000-0xc0000 . */ + wrmsr(MTRR_FIX_64K_00000, fixed_mtrr_ram); + wrmsr(MTRR_FIX_16K_80000, fixed_mtrr_ram); + wrmsr(MTRR_FIX_16K_A0000, fixed_mtrr_mmio); + wrmsr(MTRR_FIX_4K_C0000, fixed_mtrr_ram); + wrmsr(MTRR_FIX_4K_C8000, fixed_mtrr_ram); + wrmsr(MTRR_FIX_4K_D0000, fixed_mtrr_ram); + wrmsr(MTRR_FIX_4K_D8000, fixed_mtrr_ram); + wrmsr(MTRR_FIX_4K_E0000, fixed_mtrr_ram); + wrmsr(MTRR_FIX_4K_E8000, fixed_mtrr_ram); + wrmsr(MTRR_FIX_4K_F0000, fixed_mtrr_ram); + wrmsr(MTRR_FIX_4K_F8000, fixed_mtrr_ram); + + wrmsr(MTRR_DEF_TYPE_MSR, mtrr_def_type); + + /* Enable Fixed and Variable MTRRs. */ + sys_cfg.lo |= SYSCFG_MSR_MtrrFixDramEn | SYSCFG_MSR_MtrrVarDramEn; + sys_cfg.lo |= SYSCFG_MSR_TOM2En | SYSCFG_MSR_TOM2WB; + /* AGESA currently expects SYSCFG_MSR_MtrrFixDramModEn to be set. Once + MP init happens in coreboot proper it can be knocked down. */ + wrmsr(SYSCFG_MSR, sys_cfg); + + enable_cache(); +} + asmlinkage void bootblock_c_entry(uint64_t base_timestamp) { + set_caching(); enable_pci_mmconf(); /* diff --git a/src/soc/amd/cezanne/include/soc/iomap.h b/src/soc/amd/cezanne/include/soc/iomap.h index 4d47f7ed57..b377ee31fb 100644 --- a/src/soc/amd/cezanne/include/soc/iomap.h +++ b/src/soc/amd/cezanne/include/soc/iomap.h @@ -3,6 +3,9 @@ #ifndef AMD_CEZANNE_IOMAP_H #define AMD_CEZANNE_IOMAP_H +/* MMIO Ranges */ +#define FLASH_BASE_ADDR ((0xffffffff - CONFIG_ROM_SIZE) + 1) + /* I/O Ranges */ #define NCP_ERR 0x00f0 #define SMB_BASE_ADDR 0x0b00 |