/* by yhlu 6.2005 */ /* We will use 4K bytes only */ #define CacheSize DCACHE_RAM_SIZE #define CacheBase (0xd0000 - CacheSize) #include #include /* Save the BIST result */ movl %eax, %ebp // for normal part %ebx already contain cpu_init_detected from fallback call CacheAsRam: /* hope we can skip the double set for normal part */ #if USE_FALLBACK_IMAGE == 1 movl $MTRRdefType_MSR, %ecx rdmsr andl $0x00000800, %eax movl %eax, %ebx ; // We store the status about if cpu_init_detected /* Set MtrrFixDramModEn for clear fixed mtrr */ xorl %eax, %eax # clear %eax and %edx xorl %edx, %edx enable_fixed_mtrr_dram_modify: movl $SYSCFG_MSR, %ecx rdmsr andl $(~(SYSCFG_MSR_MtrrFixDramEn|SYSCFG_MSR_MtrrVarDramEn)), %eax orl $SYSCFG_MSR_MtrrFixDramModEn, %eax wrmsr /* Set the default memory type and enable fixed and variable MTRRs */ movl $MTRRdefType_MSR, %ecx xorl %edx, %edx /* Enable Variable and Fixed MTRRs */ movl $0x00000c00, %eax wrmsr /*Clear all MTRRs */ xorl %edx, %edx movl $fixed_mtrr_msr, %esi clear_fixed_var_mtrr: lodsl (%esi), %eax testl %eax, %eax jz clear_fixed_var_mtrr_out movl %eax, %ecx xorl %eax, %eax wrmsr jmp clear_fixed_var_mtrr clear_fixed_var_mtrr_out: /* Enable the MTRRs and IORRs in SYSCFG */ movl $SYSCFG_MSR, %ecx rdmsr orl $(SYSCFG_MSR_MtrrVarDramEn | SYSCFG_MSR_MtrrFixDramEn), %eax wrmsr #if CacheSize == 0x10000 /* enable caching for 64K using fixed mtrr */ movl $0x268, %ecx /* fix4k_c0000*/ movl $0x06060606, %eax /* WB IO type */ movl %eax, %edx wrmsr movl $0x269, %ecx wrmsr #endif #if CacheSize == 0x8000 /* enable caching for 32K using fixed mtrr */ movl $0x269, %ecx /* fix4k_c8000*/ movl $0x06060606, %eax /* WB IO type */ movl %eax, %edx wrmsr #endif /* enable caching for 16K/8K/4K using fixed mtrr */ movl $0x269, %ecx /* fix4k_cc000*/ #if CacheSize == 0x4000 movl $0x06060606, %edx /* WB IO type */ #endif #if CacheSize == 0x2000 movl $0x06060000, %edx /* WB IO type */ #endif #if CacheSize == 0x1000 movl $0x06000000, %edx /* WB IO type */ #endif xorl %eax, %eax wrmsr /* enable memory access for 0 - 1MB using top_mem */ movl $TOP_MEM, %ecx xorl %edx, %edx movl $(((CONFIG_LB_MEM_TOPK << 10) + TOP_MEM_MASK) & ~TOP_MEM_MASK) , %eax wrmsr #else /* disable cache */ movl %cr0, %eax orl $(0x1<<30),%eax movl %eax, %cr0 #endif /* USE_FALLBACK_IMAGE == 1*/ #if defined(XIP_ROM_SIZE) && defined(XIP_ROM_BASE) /* enable write base caching so we can do execute in place * on the flash rom. */ movl $0x202, %ecx xorl %edx, %edx movl $(XIP_ROM_BASE | MTRR_TYPE_WRBACK), %eax wrmsr movl $0x203, %ecx movl $0x0000000f, %edx movl $(~(XIP_ROM_SIZE - 1) | 0x800), %eax wrmsr #endif /* XIP_ROM_SIZE && XIP_ROM_BASE */ /* enable cache */ movl %cr0, %eax andl $0x9fffffff,%eax movl %eax, %cr0 #if USE_FALLBACK_IMAGE == 1 /* Read the range with lodsl*/ movl $(CacheBase+CacheSize-4), %esi std movl $(CacheSize>>2), %ecx rep lodsl /* Clear the range */ movl $(CacheBase+CacheSize-4), %edi movl $(CacheSize>>2), %ecx xorl %eax, %eax rep stosl #endif /*USE_FALLBACK_IMAGE == 1*/ movl $(CacheBase+CacheSize-4), %eax movl %eax, %esp /* Restore the BIST result */ movl %ebp, %eax /* We need to set ebp ? No need */ movl %esp, %ebp pushl %ebx /* init detected */ pushl %eax /* bist */ call amd64_main /* We will not go back */ fixed_mtrr_msr: .long 0x250, 0x258, 0x259 .long 0x268, 0x269, 0x26A .long 0x26B, 0x26C, 0x26D .long 0x26E, 0x26F var_mtrr_msr: .long 0x200, 0x201, 0x202, 0x203 .long 0x204, 0x205, 0x206, 0x207 .long 0x208, 0x209, 0x20A, 0x20B .long 0x20C, 0x20D, 0x20E, 0x20F var_iorr_msr: .long 0xC0010016, 0xC0010017, 0xC0010018, 0xC0010019 mem_top: .long 0xC001001A, 0xC001001D .long 0x000 /* NULL, end of table */ .CacheAsRam_out: