issue 51 and 52: set mtrr for ap before stop it, and _RAMBASE above 1M

support and pgtbl after 1M support


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2142 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

2 files changed, 43 insertions, 7 deletions

diff --git a/src/cpu/amd/car/clear_1m_ram.c b/src/cpu/amd/car/clear_1m_ram.c
index d4c6600247..c61610ff64 100644
--- a/src/cpu/amd/car/clear_1m_ram.c
+++ b/src/cpu/amd/car/clear_1m_ram.c
@@ -69,3 +69,43 @@ static inline __attribute__((always_inline)) void clear_1m_ram(void)
 #endif
         );
 }
+
+/* be warned, this file will be used by core other than core 0/node 0 or core0/node0 when cpu_reset*/
+static inline __attribute__((always_inline)) void set_1m_ram(void)
+{
+        __asm__ volatile (
+
+        /* disable cache */
+        "movl   %%cr0, %%eax\n\t"
+        "orl    $(0x1<<30),%%eax\n\t"
+        "movl    %%eax, %%cr0\n\t"
+
+        /* enable caching for first 1M using variable mtrr */
+        "movl    $0x200, %%ecx\n\t"
+        "xorl    %%edx, %%edx\n\t"
+        "movl     $(0 | 6), %%eax\n\t"
+//      "movl     $(0 | MTRR_TYPE_WRBACK), %%eax\n\t"
+        "wrmsr\n\t"
+
+        "movl    $0x201, %%ecx\n\t"
+        "movl    $0x0000000f, %%edx\n\t"
+#if CONFIG_USE_INIT
+        "movl    %%esi, %%eax\n\t"
+#else
+        "movl    $((~(( 0 + (CONFIG_LB_MEM_TOPK<<10) ) -1)) | 0x800), %%eax\n\t"
+#endif
+        "wrmsr\n\t"
+
+        /* enable cache */
+        "movl    %%cr0, %%eax\n\t"
+        "andl    $0x9fffffff,%%eax\n\t"
+        "movl    %%eax, %%cr0\n\t"
+//      "invd\n\t" // Is the BSP done with mem init?
+        :
+        :
+#if CONFIG_USE_INIT
+        "S"((~(( 0 + (CONFIG_LB_MEM_TOPK<<10) ) -1)) | 0x800)
+#endif
+        );
+}
+
diff --git a/src/cpu/amd/car/post_cache_as_ram.c b/src/cpu/amd/car/post_cache_as_ram.c
index fec5905822..345e4c34b0 100644
--- a/src/cpu/amd/car/post_cache_as_ram.c
+++ b/src/cpu/amd/car/post_cache_as_ram.c
@@ -48,13 +48,9 @@ static void post_cache_as_ram(unsigned cpu_reset)
         if(cpu_reset==0) { // cpu_reset don't need to clear it 
 		clear_1m_ram();
         }
-
-#if 0
-	int i;
-	for(i=0;i<0x800000;i++) {
-		outb(0x66, 0x80);
+	else {
+		set_1m_ram();
 	}
-#endif
 
         __asm__ volatile (
                 /* set new esp */ /* before _RAMBASE */
@@ -63,7 +59,7 @@ static void post_cache_as_ram(unsigned cpu_reset)
                 ::"a"( (DCACHE_RAM_BASE + DCACHE_RAM_SIZE)- _RAMBASE )
         );
 
-       {
+        {
                 unsigned new_cpu_reset;
 
                 /* get back cpu_reset from ebx */