diff options
Diffstat (limited to 'src/cpu/k8/cpufixup.c')
| -rw-r--r-- | src/cpu/k8/cpufixup.c | 34 |
1 files changed, 18 insertions, 16 deletions
diff --git a/src/cpu/k8/cpufixup.c b/src/cpu/k8/cpufixup.c index 9f306d1156..8e7ad95d5d 100644 --- a/src/cpu/k8/cpufixup.c +++ b/src/cpu/k8/cpufixup.c @@ -13,7 +13,8 @@ void k8_cpufixup(struct mem_range *mem) { - unsigned long lo = 0, hi = 0, i; + msr_t msr; + unsigned long i; unsigned long ram_megabytes; /* For now no Athlon board has significant holes in it's @@ -27,33 +28,34 @@ void k8_cpufixup(struct mem_range *mem) ram_megabytes = (mem[i-1].basek + mem[i-1].sizek) *1024; +#warning "FIXME handle > 4GB of ram" // 8 MB alignment please ram_megabytes += 0x7fffff; ram_megabytes &= (~0x7fffff); // set top_mem registers to ram size printk_spew("Setting top_mem to 0x%x\n", ram_megabytes); - rdmsr(TOP_MEM, lo, hi); - printk_spew("TOPMEM was 0x%02x:0x%02x\n", hi, lo); - hi = 0; - lo = ram_megabytes; - wrmsr(TOP_MEM, lo, hi); + msr = rdmsr(TOP_MEM); + printk_spew("TOPMEM was 0x%02x:0x%02x\n", msr.hi, msr.lo); + msr.hi = 0; + msr.lo = ram_megabytes; + wrmsr(TOP_MEM, msr); // I am setting this even though I won't enable it - wrmsr(TOP_MEM2, lo, hi); + wrmsr(TOP_MEM2, msr); /* zero the IORR's before we enable to prevent * undefined side effects */ - lo = hi = 0; + msr.lo = msr.hi = 0; for (i = IORR_FIRST; i <= IORR_LAST; i++) - wrmsr(i, lo, hi); - - rdmsr(SYSCFG, lo, hi); - printk_spew("SYSCFG was 0x%x:0x%x\n", hi, lo); - lo |= MTRRVARDRAMEN; - wrmsr(SYSCFG, lo, hi); - rdmsr(SYSCFG, lo, hi); - printk_spew("SYSCFG IS NOW 0x%x:0x%x\n", hi, lo); + wrmsr(i, msr); + + msr = rdmsr(SYSCFG); + printk_spew("SYSCFG was 0x%x:0x%x\n", msr.hi, msr.lo); + msr.lo |= MTRRVARDRAMEN; + wrmsr(SYSCFG, msr); + msr = rdmsr(SYSCFG); + printk_spew("SYSCFG IS NOW 0x%x:0x%x\n", msr.hi, msr.lo); } |