X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Fx86%2Fcpu%2Fcpu.c;h=1707993409875e3ea8c9496c7e4c23b8b47cd53c;hb=80af39842e64a44258ab5eb913659e29fc319903;hp=b391b7ade47298336bb9042c9b3cbb8f2bebde14;hpb=fce0a90a68de507dc827c1ff40d9e446047fa043;p=u-boot diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c index b391b7ade4..1707993409 100644 --- a/arch/x86/cpu/cpu.c +++ b/arch/x86/cpu/cpu.c @@ -21,14 +21,20 @@ #include #include +#include #include #include #include #include +#include +#include +#include +#include #include #include #include #include +#include #include DECLARE_GLOBAL_DATA_PTR; @@ -124,30 +130,42 @@ static void load_gdt(const u64 *boot_gdt, u16 num_entries) { struct gdt_ptr gdt; - gdt.len = (num_entries * 8) - 1; + gdt.len = (num_entries * X86_GDT_ENTRY_SIZE) - 1; gdt.ptr = (u32)boot_gdt; asm volatile("lgdtl %0\n" : : "m" (gdt)); } -void setup_gdt(gd_t *id, u64 *gdt_addr) +void arch_setup_gd(gd_t *new_gd) { - /* CS: code, read/execute, 4 GB, base 0 */ + u64 *gdt_addr; + + gdt_addr = new_gd->arch.gdt; + + /* + * CS: code, read/execute, 4 GB, base 0 + * + * Some OS (like VxWorks) requires GDT entry 1 to be the 32-bit CS + */ + gdt_addr[X86_GDT_ENTRY_UNUSED] = GDT_ENTRY(0xc09b, 0, 0xfffff); gdt_addr[X86_GDT_ENTRY_32BIT_CS] = GDT_ENTRY(0xc09b, 0, 0xfffff); /* DS: data, read/write, 4 GB, base 0 */ gdt_addr[X86_GDT_ENTRY_32BIT_DS] = GDT_ENTRY(0xc093, 0, 0xfffff); /* FS: data, read/write, 4 GB, base (Global Data Pointer) */ - id->arch.gd_addr = id; + new_gd->arch.gd_addr = new_gd; gdt_addr[X86_GDT_ENTRY_32BIT_FS] = GDT_ENTRY(0xc093, - (ulong)&id->arch.gd_addr, 0xfffff); + (ulong)&new_gd->arch.gd_addr, 0xfffff); /* 16-bit CS: code, read/execute, 64 kB, base 0 */ - gdt_addr[X86_GDT_ENTRY_16BIT_CS] = GDT_ENTRY(0x109b, 0, 0x0ffff); + gdt_addr[X86_GDT_ENTRY_16BIT_CS] = GDT_ENTRY(0x009b, 0, 0x0ffff); /* 16-bit DS: data, read/write, 64 kB, base 0 */ - gdt_addr[X86_GDT_ENTRY_16BIT_DS] = GDT_ENTRY(0x1093, 0, 0x0ffff); + gdt_addr[X86_GDT_ENTRY_16BIT_DS] = GDT_ENTRY(0x0093, 0, 0x0ffff); + + gdt_addr[X86_GDT_ENTRY_16BIT_FLAT_CS] = GDT_ENTRY(0x809b, 0, 0xfffff); + gdt_addr[X86_GDT_ENTRY_16BIT_FLAT_DS] = GDT_ENTRY(0x8093, 0, 0xfffff); load_gdt(gdt_addr, X86_GDT_NUM_ENTRIES); load_ds(X86_GDT_ENTRY_32BIT_DS); @@ -157,10 +175,30 @@ void setup_gdt(gd_t *id, u64 *gdt_addr) load_fs(X86_GDT_ENTRY_32BIT_FS); } +#ifdef CONFIG_HAVE_FSP +/* + * Setup FSP execution environment GDT + * + * Per Intel FSP external architecture specification, before calling any FSP + * APIs, we need make sure the system is in flat 32-bit mode and both the code + * and data selectors should have full 4GB access range. Here we reuse the one + * we used in arch/x86/cpu/start16.S, and reload the segement registers. + */ +void setup_fsp_gdt(void) +{ + load_gdt((const u64 *)(gdt_rom + CONFIG_RESET_SEG_START), 4); + load_ds(X86_GDT_ENTRY_32BIT_DS); + load_ss(X86_GDT_ENTRY_32BIT_DS); + load_es(X86_GDT_ENTRY_32BIT_DS); + load_fs(X86_GDT_ENTRY_32BIT_DS); + load_gs(X86_GDT_ENTRY_32BIT_DS); +} +#endif + int __weak x86_cleanup_before_linux(void) { #ifdef CONFIG_BOOTSTAGE_STASH - bootstage_stash((void *)CONFIG_BOOTSTAGE_STASH, + bootstage_stash((void *)CONFIG_BOOTSTAGE_STASH_ADDR, CONFIG_BOOTSTAGE_STASH_SIZE); #endif @@ -220,6 +258,11 @@ static bool has_cpuid(void) return flag_is_changeable_p(X86_EFLAGS_ID); } +static bool has_mtrr(void) +{ + return cpuid_edx(0x00000001) & (1 << 12) ? true : false; +} + static int build_vendor_name(char *vendor_name) { struct cpuid_result result; @@ -295,13 +338,15 @@ int x86_cpu_init_f(void) const u32 em_rst = ~X86_CR0_EM; const u32 mp_ne_set = X86_CR0_MP | X86_CR0_NE; - /* initialize FPU, reset EM, set MP and NE */ - asm ("fninit\n" \ - "movl %%cr0, %%eax\n" \ - "andl %0, %%eax\n" \ - "orl %1, %%eax\n" \ - "movl %%eax, %%cr0\n" \ - : : "i" (em_rst), "i" (mp_ne_set) : "eax"); + if (ll_boot_init()) { + /* initialize FPU, reset EM, set MP and NE */ + asm ("fninit\n" \ + "movl %%cr0, %%eax\n" \ + "andl %0, %%eax\n" \ + "orl %1, %%eax\n" \ + "movl %%eax, %%cr0\n" \ + : : "i" (em_rst), "i" (mp_ne_set) : "eax"); + } /* identify CPU via cpuid and store the decoded info into gd->arch */ if (has_cpuid()) { @@ -315,19 +360,48 @@ int x86_cpu_init_f(void) gd->arch.x86_model = c.x86_model; gd->arch.x86_mask = c.x86_mask; gd->arch.x86_device = cpu.device; + + gd->arch.has_mtrr = has_mtrr(); + } + /* Don't allow PCI region 3 to use memory in the 2-4GB memory hole */ + gd->pci_ram_top = 0x80000000U; + + /* Configure fixed range MTRRs for some legacy regions */ + if (gd->arch.has_mtrr) { + u64 mtrr_cap; + + mtrr_cap = native_read_msr(MTRR_CAP_MSR); + if (mtrr_cap & MTRR_CAP_FIX) { + /* Mark the VGA RAM area as uncacheable */ + native_write_msr(MTRR_FIX_16K_A0000_MSR, + MTRR_FIX_TYPE(MTRR_TYPE_UNCACHEABLE), + MTRR_FIX_TYPE(MTRR_TYPE_UNCACHEABLE)); + + /* + * Mark the PCI ROM area as cacheable to improve ROM + * execution performance. + */ + native_write_msr(MTRR_FIX_4K_C0000_MSR, + MTRR_FIX_TYPE(MTRR_TYPE_WRBACK), + MTRR_FIX_TYPE(MTRR_TYPE_WRBACK)); + native_write_msr(MTRR_FIX_4K_C8000_MSR, + MTRR_FIX_TYPE(MTRR_TYPE_WRBACK), + MTRR_FIX_TYPE(MTRR_TYPE_WRBACK)); + native_write_msr(MTRR_FIX_4K_D0000_MSR, + MTRR_FIX_TYPE(MTRR_TYPE_WRBACK), + MTRR_FIX_TYPE(MTRR_TYPE_WRBACK)); + native_write_msr(MTRR_FIX_4K_D8000_MSR, + MTRR_FIX_TYPE(MTRR_TYPE_WRBACK), + MTRR_FIX_TYPE(MTRR_TYPE_WRBACK)); + + /* Enable the fixed range MTRRs */ + msr_setbits_64(MTRR_DEF_TYPE_MSR, MTRR_DEF_TYPE_FIX_EN); + } } return 0; } -int x86_cpu_init_r(void) -{ - /* Initialize core interrupt and exception functionality of CPU */ - cpu_init_interrupts(); - return 0; -} -int cpu_init_r(void) __attribute__((weak, alias("x86_cpu_init_r"))); - void x86_enable_caches(void) { unsigned long cr0; @@ -377,26 +451,22 @@ void flush_cache(unsigned long dummy1, unsigned long dummy2) asm("wbinvd\n"); } -void __attribute__ ((regparm(0))) generate_gpf(void); - -/* segment 0x70 is an arbitrary segment which does not exist */ -asm(".globl generate_gpf\n" - ".hidden generate_gpf\n" - ".type generate_gpf, @function\n" - "generate_gpf:\n" - "ljmp $0x70, $0x47114711\n"); - __weak void reset_cpu(ulong addr) { - printf("Resetting using x86 Triple Fault\n"); - set_vector(13, generate_gpf); /* general protection fault handler */ - set_vector(8, generate_gpf); /* double fault handler */ - generate_gpf(); /* start the show */ + /* Do a hard reset through the chipset's reset control register */ + outb(SYS_RST | RST_CPU, PORT_RESET); + for (;;) + cpu_hlt(); +} + +void x86_full_reset(void) +{ + outb(FULL_RST | SYS_RST | RST_CPU, PORT_RESET); } int dcache_status(void) { - return !(read_cr0() & 0x40000000); + return !(read_cr0() & X86_CR0_CD); } /* Define these functions to allow ehch-hcd to function */ @@ -571,23 +641,71 @@ int cpu_jump_to_64bit(ulong setup_base, ulong target) void show_boot_progress(int val) { -#if MIN_PORT80_KCLOCKS_DELAY + outb(val, POST_PORT); +} + +#ifndef CONFIG_SYS_COREBOOT +int last_stage_init(void) +{ + write_tables(); + + return 0; +} +#endif + +#ifdef CONFIG_SMP +static int enable_smis(struct udevice *cpu, void *unused) +{ + return 0; +} + +static struct mp_flight_record mp_steps[] = { + MP_FR_BLOCK_APS(mp_init_cpu, NULL, mp_init_cpu, NULL), + /* Wait for APs to finish initialization before proceeding */ + MP_FR_BLOCK_APS(NULL, NULL, enable_smis, NULL), +}; + +static int x86_mp_init(void) +{ + struct mp_params mp_params; + + mp_params.parallel_microcode_load = 0, + mp_params.flight_plan = &mp_steps[0]; + mp_params.num_records = ARRAY_SIZE(mp_steps); + mp_params.microcode_pointer = 0; + + if (mp_init(&mp_params)) { + printf("Warning: MP init failure\n"); + return -EIO; + } + + return 0; +} +#endif + +__weak int x86_init_cpus(void) +{ +#ifdef CONFIG_SMP + debug("Init additional CPUs\n"); + x86_mp_init(); +#else + struct udevice *dev; + /* - * Scale the time counter reading to avoid using 64 bit arithmetics. - * Can't use get_timer() here becuase it could be not yet - * initialized or even implemented. + * This causes the cpu-x86 driver to be probed. + * We don't check return value here as we want to allow boards + * which have not been converted to use cpu uclass driver to boot. */ - if (!gd->arch.tsc_prev) { - gd->arch.tsc_base_kclocks = rdtsc() / 1000; - gd->arch.tsc_prev = 0; - } else { - uint32_t now; - - do { - now = rdtsc() / 1000 - gd->arch.tsc_base_kclocks; - } while (now < (gd->arch.tsc_prev + MIN_PORT80_KCLOCKS_DELAY)); - gd->arch.tsc_prev = now; - } + uclass_first_device(UCLASS_CPU, &dev); #endif - outb(val, POST_PORT); + + return 0; +} + +int cpu_init_r(void) +{ + if (ll_boot_init()) + return x86_init_cpus(); + + return 0; }