X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Fx86%2Fcpu%2Fcpu.c;h=1b76ca117ee3df339d981bfe3cde74cbd4a9ee9d;hb=b06862b9d8ea7046287ac84589210ef16a1afc0d;hp=d108ee5c4e25538bc60314f19d03e83caf0837fc;hpb=61788e468ebe4a7b8c852ab4e761e084a7975a93;p=u-boot

diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c
index d108ee5c4e..1b76ca117e 100644
--- a/arch/x86/cpu/cpu.c
+++ b/arch/x86/cpu/cpu.c
@@ -28,6 +28,8 @@
 #include <asm/cpu.h>
 #include <asm/lapic.h>
 #include <asm/mp.h>
+#include <asm/msr.h>
+#include <asm/mtrr.h>
 #include <asm/post.h>
 #include <asm/processor.h>
 #include <asm/processor-flags.h>
@@ -134,9 +136,12 @@ static void load_gdt(const u64 *boot_gdt, u16 num_entries)
 	asm volatile("lgdtl %0\n" : : "m" (gdt));
 }
 
-void setup_gdt(gd_t *id, u64 *gdt_addr)
+void arch_setup_gd(gd_t *new_gd)
 {
-	id->arch.gdt = gdt_addr;
+	u64 *gdt_addr;
+
+	gdt_addr = new_gd->arch.gdt;
+
 	/* CS: code, read/execute, 4 GB, base 0 */
 	gdt_addr[X86_GDT_ENTRY_32BIT_CS] = GDT_ENTRY(0xc09b, 0, 0xfffff);
 
@@ -144,9 +149,9 @@ void setup_gdt(gd_t *id, u64 *gdt_addr)
 	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(0x009b, 0, 0x0ffff);
@@ -328,13 +333,15 @@ 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()) {
@@ -351,6 +358,41 @@ int x86_cpu_init_f(void)
 
 		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;
 }
@@ -419,7 +461,7 @@ void x86_full_reset(void)
 
 int dcache_status(void)
 {
-	return !(read_cr0() & 0x40000000);
+	return !(read_cr0() & X86_CR0_CD);
 }
 
 /* Define these functions to allow ehch-hcd to function */
@@ -659,6 +701,15 @@ __weak int x86_init_cpus(void)
 #ifdef CONFIG_SMP
 	debug("Init additional CPUs\n");
 	x86_mp_init();
+#else
+	struct udevice *dev;
+
+	/*
+	 * 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.
+	 */
+	uclass_first_device(UCLASS_CPU, &dev);
 #endif
 
 	return 0;
@@ -666,5 +717,8 @@ __weak int x86_init_cpus(void)
 
 int cpu_init_r(void)
 {
-	return x86_init_cpus();
+	if (ll_boot_init())
+		return x86_init_cpus();
+
+	return 0;
 }