x86: Move the i386 code into its own directory

Much of the cpu and interrupt code cannot be compiled on 64-bit x86. Move it
into its own directory and build it only in 32-bit mode.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

1 files changed, 0 insertions, 504 deletions

diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c
index 7c1d6de..8fa6953 100644
--- a/arch/x86/cpu/cpu.c
+++ b/arch/x86/cpu/cpu.c
@@ -43,55 +43,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-/*
- * Constructor for a conventional segment GDT (or LDT) entry
- * This is a macro so it can be used in initialisers
- */
-#define GDT_ENTRY(flags, base, limit)			\
-	((((base)  & 0xff000000ULL) << (56-24)) |	\
-	 (((flags) & 0x0000f0ffULL) << 40) |		\
-	 (((limit) & 0x000f0000ULL) << (48-16)) |	\
-	 (((base)  & 0x00ffffffULL) << 16) |		\
-	 (((limit) & 0x0000ffffULL)))
-
-struct gdt_ptr {
-	u16 len;
-	u32 ptr;
-} __packed;
-
-struct cpu_device_id {
-	unsigned vendor;
-	unsigned device;
-};
-
-struct cpuinfo_x86 {
-	uint8_t x86;            /* CPU family */
-	uint8_t x86_vendor;     /* CPU vendor */
-	uint8_t x86_model;
-	uint8_t x86_mask;
-};
-
-/*
- * List of cpu vendor strings along with their normalized
- * id values.
- */
-static const struct {
-	int vendor;
-	const char *name;
-} x86_vendors[] = {
-	{ X86_VENDOR_INTEL,     "GenuineIntel", },
-	{ X86_VENDOR_CYRIX,     "CyrixInstead", },
-	{ X86_VENDOR_AMD,       "AuthenticAMD", },
-	{ X86_VENDOR_UMC,       "UMC UMC UMC ", },
-	{ X86_VENDOR_NEXGEN,    "NexGenDriven", },
-	{ X86_VENDOR_CENTAUR,   "CentaurHauls", },
-	{ X86_VENDOR_RISE,      "RiseRiseRise", },
-	{ X86_VENDOR_TRANSMETA, "GenuineTMx86", },
-	{ X86_VENDOR_TRANSMETA, "TransmetaCPU", },
-	{ X86_VENDOR_NSC,       "Geode by NSC", },
-	{ X86_VENDOR_SIS,       "SiS SiS SiS ", },
-};
-
 static const char *const x86_vendor_name[] = {
 	[X86_VENDOR_INTEL]     = "Intel",
 	[X86_VENDOR_CYRIX]     = "Cyrix",
@@ -105,100 +56,6 @@ static const char *const x86_vendor_name[] = {
 	[X86_VENDOR_SIS]       = "SiS",
 };
 
-static void load_ds(u32 segment)
-{
-	asm volatile("movl %0, %%ds" : : "r" (segment * X86_GDT_ENTRY_SIZE));
-}
-
-static void load_es(u32 segment)
-{
-	asm volatile("movl %0, %%es" : : "r" (segment * X86_GDT_ENTRY_SIZE));
-}
-
-static void load_fs(u32 segment)
-{
-	asm volatile("movl %0, %%fs" : : "r" (segment * X86_GDT_ENTRY_SIZE));
-}
-
-static void load_gs(u32 segment)
-{
-	asm volatile("movl %0, %%gs" : : "r" (segment * X86_GDT_ENTRY_SIZE));
-}
-
-static void load_ss(u32 segment)
-{
-	asm volatile("movl %0, %%ss" : : "r" (segment * X86_GDT_ENTRY_SIZE));
-}
-
-static void load_gdt(const u64 *boot_gdt, u16 num_entries)
-{
-	struct gdt_ptr gdt;
-
-	gdt.len = (num_entries * X86_GDT_ENTRY_SIZE) - 1;
-	gdt.ptr = (ulong)boot_gdt;
-
-	asm volatile("lgdtl %0\n" : : "m" (gdt));
-}
-
-void arch_setup_gd(gd_t *new_gd)
-{
-	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) */
-	new_gd->arch.gd_addr = new_gd;
-	gdt_addr[X86_GDT_ENTRY_32BIT_FS] = GDT_ENTRY(0xc093,
-		     (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(0x009b, 0, 0x0ffff);
-
-	/* 16-bit DS: data, read/write, 64 kB, base 0 */
-	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);
-	load_es(X86_GDT_ENTRY_32BIT_DS);
-	load_gs(X86_GDT_ENTRY_32BIT_DS);
-	load_ss(X86_GDT_ENTRY_32BIT_DS);
-	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
@@ -209,241 +66,6 @@ int __weak x86_cleanup_before_linux(void)
 	return 0;
 }
 
-/*
- * Cyrix CPUs without cpuid or with cpuid not yet enabled can be detected
- * by the fact that they preserve the flags across the division of 5/2.
- * PII and PPro exhibit this behavior too, but they have cpuid available.
- */
-
-/*
- * Perform the Cyrix 5/2 test. A Cyrix won't change
- * the flags, while other 486 chips will.
- */
-static inline int test_cyrix_52div(void)
-{
-	unsigned int test;
-
-	__asm__ __volatile__(
-	     "sahf\n\t"		/* clear flags (%eax = 0x0005) */
-	     "div %b2\n\t"	/* divide 5 by 2 */
-	     "lahf"		/* store flags into %ah */
-	     : "=a" (test)
-	     : "0" (5), "q" (2)
-	     : "cc");
-
-	/* AH is 0x02 on Cyrix after the divide.. */
-	return (unsigned char) (test >> 8) == 0x02;
-}
-
-/*
- *	Detect a NexGen CPU running without BIOS hypercode new enough
- *	to have CPUID. (Thanks to Herbert Oppmann)
- */
-
-static int deep_magic_nexgen_probe(void)
-{
-	int ret;
-
-	__asm__ __volatile__ (
-		"	movw	$0x5555, %%ax\n"
-		"	xorw	%%dx,%%dx\n"
-		"	movw	$2, %%cx\n"
-		"	divw	%%cx\n"
-		"	movl	$0, %%eax\n"
-		"	jnz	1f\n"
-		"	movl	$1, %%eax\n"
-		"1:\n"
-		: "=a" (ret) : : "cx", "dx");
-	return  ret;
-}
-
-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;
-	result = cpuid(0x00000000);
-	unsigned int *name_as_ints = (unsigned int *)vendor_name;
-
-	name_as_ints[0] = result.ebx;
-	name_as_ints[1] = result.edx;
-	name_as_ints[2] = result.ecx;
-
-	return result.eax;
-}
-
-static void identify_cpu(struct cpu_device_id *cpu)
-{
-	char vendor_name[16];
-	int i;
-
-	vendor_name[0] = '\0'; /* Unset */
-	cpu->device = 0; /* fix gcc 4.4.4 warning */
-
-	/* Find the id and vendor_name */
-	if (!has_cpuid()) {
-		/* Its a 486 if we can modify the AC flag */
-		if (flag_is_changeable_p(X86_EFLAGS_AC))
-			cpu->device = 0x00000400; /* 486 */
-		else
-			cpu->device = 0x00000300; /* 386 */
-		if ((cpu->device == 0x00000400) && test_cyrix_52div()) {
-			memcpy(vendor_name, "CyrixInstead", 13);
-			/* If we ever care we can enable cpuid here */
-		}
-		/* Detect NexGen with old hypercode */
-		else if (deep_magic_nexgen_probe())
-			memcpy(vendor_name, "NexGenDriven", 13);
-	}
-	if (has_cpuid()) {
-		int  cpuid_level;
-
-		cpuid_level = build_vendor_name(vendor_name);
-		vendor_name[12] = '\0';
-
-		/* Intel-defined flags: level 0x00000001 */
-		if (cpuid_level >= 0x00000001) {
-			cpu->device = cpuid_eax(0x00000001);
-		} else {
-			/* Have CPUID level 0 only unheard of */
-			cpu->device = 0x00000400;
-		}
-	}
-	cpu->vendor = X86_VENDOR_UNKNOWN;
-	for (i = 0; i < ARRAY_SIZE(x86_vendors); i++) {
-		if (memcmp(vendor_name, x86_vendors[i].name, 12) == 0) {
-			cpu->vendor = x86_vendors[i].vendor;
-			break;
-		}
-	}
-}
-
-static inline void get_fms(struct cpuinfo_x86 *c, uint32_t tfms)
-{
-	c->x86 = (tfms >> 8) & 0xf;
-	c->x86_model = (tfms >> 4) & 0xf;
-	c->x86_mask = tfms & 0xf;
-	if (c->x86 == 0xf)
-		c->x86 += (tfms >> 20) & 0xff;
-	if (c->x86 >= 0x6)
-		c->x86_model += ((tfms >> 16) & 0xF) << 4;
-}
-
-u32 cpu_get_family_model(void)
-{
-	return gd->arch.x86_device & 0x0fff0ff0;
-}
-
-u32 cpu_get_stepping(void)
-{
-	return gd->arch.x86_mask;
-}
-
-int x86_cpu_init_f(void)
-{
-	const u32 em_rst = ~X86_CR0_EM;
-	const u32 mp_ne_set = X86_CR0_MP | X86_CR0_NE;
-
-	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()) {
-		struct cpu_device_id cpu;
-		struct cpuinfo_x86 c;
-
-		identify_cpu(&cpu);
-		get_fms(&c, cpu.device);
-		gd->arch.x86 = c.x86;
-		gd->arch.x86_vendor = cpu.vendor;
-		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);
-		}
-	}
-
-#ifdef CONFIG_I8254_TIMER
-	/* Set up the i8254 timer if required */
-	i8254_init();
-#endif
-
-	return 0;
-}
-
-void x86_enable_caches(void)
-{
-	unsigned long cr0;
-
-	cr0 = read_cr0();
-	cr0 &= ~(X86_CR0_NW | X86_CR0_CD);
-	write_cr0(cr0);
-	wbinvd();
-}
-void enable_caches(void) __attribute__((weak, alias("x86_enable_caches")));
-
-void x86_disable_caches(void)
-{
-	unsigned long cr0;
-
-	cr0 = read_cr0();
-	cr0 |= X86_CR0_NW | X86_CR0_CD;
-	wbinvd();
-	write_cr0(cr0);
-	wbinvd();
-}
-void disable_caches(void) __attribute__((weak, alias("x86_disable_caches")));
-
 int x86_init_cache(void)
 {
 	enable_caches();
@@ -483,11 +105,6 @@ void x86_full_reset(void)
 	outb(FULL_RST | SYS_RST | RST_CPU, IO_PORT_RESET);
 }
 
-int dcache_status(void)
-{
-	return !(read_cr0() & X86_CR0_CD);
-}
-
 /* Define these functions to allow ehch-hcd to function */
 void flush_dcache_range(unsigned long start, unsigned long stop)
 {
@@ -520,57 +137,6 @@ int icache_status(void)
 	return 1;
 }
 
-void cpu_enable_paging_pae(ulong cr3)
-{
-	__asm__ __volatile__(
-		/* Load the page table address */
-		"movl	%0, %%cr3\n"
-		/* Enable pae */
-		"movl	%%cr4, %%eax\n"
-		"orl	$0x00000020, %%eax\n"
-		"movl	%%eax, %%cr4\n"
-		/* Enable paging */
-		"movl	%%cr0, %%eax\n"
-		"orl	$0x80000000, %%eax\n"
-		"movl	%%eax, %%cr0\n"
-		:
-		: "r" (cr3)
-		: "eax");
-}
-
-void cpu_disable_paging_pae(void)
-{
-	/* Turn off paging */
-	__asm__ __volatile__ (
-		/* Disable paging */
-		"movl	%%cr0, %%eax\n"
-		"andl	$0x7fffffff, %%eax\n"
-		"movl	%%eax, %%cr0\n"
-		/* Disable pae */
-		"movl	%%cr4, %%eax\n"
-		"andl	$0xffffffdf, %%eax\n"
-		"movl	%%eax, %%cr4\n"
-		:
-		:
-		: "eax");
-}
-
-static bool can_detect_long_mode(void)
-{
-	return cpuid_eax(0x80000000) > 0x80000000UL;
-}
-
-static bool has_long_mode(void)
-{
-	return cpuid_edx(0x80000001) & (1 << 29) ? true : false;
-}
-
-int cpu_has_64bit(void)
-{
-	return has_cpuid() && can_detect_long_mode() &&
-		has_long_mode();
-}
-
 const char *cpu_vendor_name(int vendor)
 {
 	const char *name;
@@ -616,46 +182,6 @@ int default_print_cpuinfo(void)
 	return 0;
 }
 
-#define PAGETABLE_SIZE		(6 * 4096)
-
-/**
- * build_pagetable() - build a flat 4GiB page table structure for 64-bti mode
- *
- * @pgtable: Pointer to a 24iKB block of memory
- */
-static void build_pagetable(uint32_t *pgtable)
-{
-	uint i;
-
-	memset(pgtable, '\0', PAGETABLE_SIZE);
-
-	/* Level 4 needs a single entry */
-	pgtable[0] = (ulong)&pgtable[1024] + 7;
-
-	/* Level 3 has one 64-bit entry for each GiB of memory */
-	for (i = 0; i < 4; i++)
-		pgtable[1024 + i * 2] = (ulong)&pgtable[2048] + 0x1000 * i + 7;
-
-	/* Level 2 has 2048 64-bit entries, each repesenting 2MiB */
-	for (i = 0; i < 2048; i++)
-		pgtable[2048 + i * 2] = 0x183 + (i << 21UL);
-}
-
-int cpu_jump_to_64bit(ulong setup_base, ulong target)
-{
-	uint32_t *pgtable;
-
-	pgtable = memalign(4096, PAGETABLE_SIZE);
-	if (!pgtable)
-		return -ENOMEM;
-
-	build_pagetable(pgtable);
-	cpu_call64((ulong)pgtable, setup_base, target);
-	free(pgtable);
-
-	return -EFAULT;
-}
-
 void show_boot_progress(int val)
 {
 	outb(val, POST_PORT);
@@ -680,36 +206,6 @@ int last_stage_init(void)
 }
 #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
-
 static int x86_init_cpus(void)
 {
 #ifdef CONFIG_SMP