diff options
Diffstat (limited to 'src/cpu/k8/cpufixup.c')
| -rw-r--r-- | src/cpu/k8/cpufixup.c | 159 |
1 files changed, 101 insertions, 58 deletions
diff --git a/src/cpu/k8/cpufixup.c b/src/cpu/k8/cpufixup.c index 6edfe73bf6..499fdf9045 100644 --- a/src/cpu/k8/cpufixup.c +++ b/src/cpu/k8/cpufixup.c @@ -66,8 +66,6 @@ static inline void wrmsr_amd(unsigned index, msr_t msr) ); } - - #define MTRR_COUNT 8 #define ZERO_CHUNK_KB 0x800UL /* 2M */ #define TOLM_KB 0x400000UL @@ -292,14 +290,65 @@ static void init_ecc_memory(void) printk_debug(" done\n"); } -void k8_cpufixup(struct mem_range *mem) +static void k8_errata(void) +{ + msr_t msr; + + if (is_cpu_pre_c0()) { + /* Erratum 63... */ + msr = rdmsr(HWCR_MSR); + msr.lo |= (1 << 6); + wrmsr(HWCR_MSR, msr); + + /* Erratum 69... */ + msr = rdmsr_amd(BU_CFG_MSR); + msr.hi |= (1 << (45 - 32)); + wrmsr_amd(BU_CFG_MSR, msr); + + /* Erratum 81... */ + msr = rdmsr_amd(DC_CFG_MSR); + msr.lo |= (1 << 10); + wrmsr_amd(DC_CFG_MSR, msr); + } + + /* I can't touch this msr on early buggy cpus */ + if (!is_cpu_pre_b3()) { + /* Erratum 89 ... */ + msr = rdmsr(NB_CFG_MSR); + msr.lo |= 1 << 3; + if (!is_cpu_pre_c0()) { + /* Erratum 86 Disable data masking on C0 and + * later processor revs. + * FIXME this is only needed if ECC is enabled. + */ + msr.hi |= 1 << (36 - 32); + } + wrmsr(NB_CFG_MSR, msr); + } + + /* Erratum 97 ... */ + if (!is_cpu_pre_c0()) { + msr = rdmsr_amd(DC_CFG_MSR); + msr.lo |= 1 << 3; + wrmsr_amd(DC_CFG_MSR, msr); + } + + /* Erratum 94 ... */ + msr = rdmsr_amd(IC_CFG_MSR); + msr.lo |= 1 << 11; + wrmsr_amd(IC_CFG_MSR, msr); + + /* Erratum 91 prefetch miss is handled in the kernel */ +} + +static void setup_toms(struct mem_range *mem) { - unsigned long mmio_basek, tomk; unsigned long i; msr_t msr; + unsigned long mmio_basek, tomk; + + printk_spew("%s\n", __FUNCTION__); - disable_cache(); - /* 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. @@ -331,16 +380,56 @@ void k8_cpufixup(struct mem_range *mem) /* Setup TOP_MEM2 */ msr.hi = tomk >> 22; msr.lo = tomk << 10; - wrmsr(TOP_MEM2, msr); + wrmsr(TOP_MEM2, msr); +} + +static void setup_iorrs(void) +{ + unsigned long i; + msr_t msr; + device_t f3_dev; + uint32_t base, size; /* 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); } + /* enable IORR1 for AGP Aperture */ + f3_dev = dev_find_slot(0, PCI_DEVFN(0x18, 3)); + if (!f3_dev) { + die("Cannot find cpu function 3\n"); + } + + size = (pci_read_config32(f3_dev, 0x90) & 0x0E) >> 1; + size = (32*1024*1024) << size; + base = pci_read_config32(f3_dev, 0x94) << 25; + printk_debug("%s: setting IORR1 for AGP aperture base 0x%x, size 0x%x\n", + __FUNCTION__, base, size); + + msr.lo = base; + msr.hi = 0xff; + wrmsr(IORR1_BASE, msr); + + msr.lo = ~(size - 1); + msr.hi = 0xff; + wrmsr(IORR1_MASK, msr); +} + +void k8_cpufixup(struct mem_range *mem) +{ + unsigned long i; + msr_t msr; + + disable_cache(); + + setup_toms(mem); + + setup_iorrs(); + + /* Enable TOMs and IORRs */ msr = rdmsr(SYSCFG_MSR); msr.lo |= SYSCFG_MSR_MtrrVarDramEn | SYSCFG_MSR_TOM2En; wrmsr(SYSCFG_MSR, msr); @@ -348,58 +437,12 @@ void k8_cpufixup(struct mem_range *mem) /* zero the machine check error status registers */ msr.lo = 0; msr.hi = 0; - for(i=0; i<5; i++) { + for (i = 0; i < 5; i++) { wrmsr(MCI_STATUS + (i*4),msr); } - - if (is_cpu_pre_c0()) { - /* Erratum 63... */ - msr = rdmsr(HWCR_MSR); - msr.lo |= (1 << 6); - wrmsr(HWCR_MSR, msr); - - /* Erratum 69... */ - msr = rdmsr_amd(BU_CFG_MSR); - msr.hi |= (1 << (45 - 32)); - wrmsr_amd(BU_CFG_MSR, msr); - - /* Erratum 81... */ - msr = rdmsr_amd(DC_CFG_MSR); - msr.lo |= (1 << 10); - wrmsr_amd(DC_CFG_MSR, msr); - - } - /* I can't touch this msr on early buggy cpus */ - if (!is_cpu_pre_b3()) { - /* Erratum 89 ... */ - msr = rdmsr(NB_CFG_MSR); - msr.lo |= 1 << 3; - - if (!is_cpu_pre_c0()) { - /* Erratum 86 Disable data masking on C0 and - * later processor revs. - * FIXME this is only needed if ECC is enabled. - */ - msr.hi |= 1 << (36 - 32); - } - wrmsr(NB_CFG_MSR, msr); - } - - /* Erratum 97 ... */ - if (!is_cpu_pre_c0()) { - msr = rdmsr_amd(DC_CFG_MSR); - msr.lo |= 1 << 3; - wrmsr_amd(DC_CFG_MSR, msr); - } - - /* Erratum 94 ... */ - msr = rdmsr_amd(IC_CFG_MSR); - msr.lo |= 1 << 11; - wrmsr_amd(IC_CFG_MSR, msr); + k8_errata(); - /* Erratum 91 prefetch miss is handled in the kernel */ - enable_cache(); /* Is this a bad location? In particular can another node prefecth |