-/* 2005.6 by yhlu
+/* 2005.6 by yhlu
* 2006.3 yhlu add copy data from CAR to ram
*/
+#include <string.h>
+#include <arch/stages.h>
+#include <cpu/x86/mtrr.h>
#include "cpu/amd/car/disable_cache_as_ram.c"
-
-#include "cpu/amd/car/clear_init_ram.c"
+#include "cpu/x86/mtrr/earlymtrr.c"
static inline void print_debug_pcar(const char *strval, uint32_t val)
{
-#if CONFIG_USE_PRINTK_IN_CAR
- printk_debug("%s%08x\r\n", strval, val);
-#else
- print_debug(strval); print_debug_hex32(val); print_debug("\r\n");
-#endif
+ printk(BIOS_DEBUG, "%s%08x\n", strval, val);
}
+/* from linux kernel 2.6.32 asm/string_32.h */
+
static void inline __attribute__((always_inline)) memcopy(void *dest, const void *src, unsigned long bytes)
{
- __asm__ volatile(
- "cld\n\t"
- "rep; movsl\n\t"
- : /* No outputs */
- : "S" (src), "D" (dest), "c" ((bytes)>>2)
- );
+ int d0, d1, d2;
+ asm volatile("cld ; rep ; movsl\n\t"
+ "movl %4,%%ecx\n\t"
+ "andl $3,%%ecx\n\t"
+ "jz 1f\n\t"
+ "rep ; movsb\n\t"
+ "1:"
+ : "=&c" (d0), "=&D" (d1), "=&S" (d2)
+ : "0" (bytes / 4), "g" (bytes), "1" ((long)dest), "2" ((long)src)
+ : "memory", "cc");
}
+#if CONFIG_HAVE_ACPI_RESUME == 1
-static void post_cache_as_ram(void)
+static inline void *backup_resume(void) {
+ unsigned long high_ram_base;
+ void *resume_backup_memory;
+ int suspend = acpi_is_wakeup_early();
+
+ if (!suspend)
+ return NULL;
+
+ /* Start address of high memory tables */
+ high_ram_base = (u32) get_cbmem_toc();
+
+ print_debug_pcar("CBMEM TOC is at: ", (uint32_t)high_ram_base);
+ print_debug_pcar("CBMEM TOC 0-size: ",(uint32_t)(high_ram_base + HIGH_MEMORY_SIZE + 4096));
+
+ cbmem_reinit((u64)high_ram_base);
+
+ resume_backup_memory = cbmem_find(CBMEM_ID_RESUME);
+
+ /* copy 1MB - 64K to high tables ram_base to prevent memory corruption
+ * through stage 2. We could keep stuff like stack and heap in high tables
+ * memory completely, but that's a wonderful clean up task for another
+ * day.
+ */
+
+ if (resume_backup_memory) {
+ print_debug_pcar("Will copy coreboot region to: ", (uint32_t) resume_backup_memory);
+ /* copy only backup only memory used for CAR */
+ memcopy(resume_backup_memory+HIGH_MEMORY_SAVE-CONFIG_DCACHE_RAM_SIZE,
+ (void *)((CONFIG_RAMTOP)-CONFIG_DCACHE_RAM_SIZE),
+ CONFIG_DCACHE_RAM_SIZE); //inline
+ }
+
+ return resume_backup_memory;
+}
+#endif
+
+/* Disable Erratum 343 Workaround, see RevGuide for Fam10h, Pub#41322 Rev 3.33 */
+
+static void vErrata343(void)
{
+#ifdef BU_CFG2_MSR
+ msr_t msr;
+ unsigned int uiMask = 0xFFFFFFF7;
+ msr = rdmsr(BU_CFG2_MSR);
+ msr.hi &= uiMask; // set bit 35 to 0
+ wrmsr(BU_CFG2_MSR, msr);
+#endif
+}
+
+static void post_cache_as_ram(void)
+{
+#if CONFIG_HAVE_ACPI_RESUME == 1
+ void *resume_backup_memory;
+#endif
#if 1
- {
- /* Check value of esp to verify if we have enough rom for stack in Cache as RAM */
- unsigned v_esp;
- __asm__ volatile (
- "movl %%esp, %0\n\t"
- : "=a" (v_esp)
- );
- print_debug_pcar("v_esp=", v_esp);
- }
+ {
+ /* Check value of esp to verify if we have enough rom for stack in Cache as RAM */
+ unsigned v_esp;
+ __asm__ volatile (
+ "movl %%esp, %0\n\t"
+ : "=a" (v_esp)
+ );
+ print_debug_pcar("v_esp=", v_esp);
+ }
#endif
unsigned testx = 0x5a5a5a5a;
print_debug_pcar("testx = ", testx);
- /* copy data from cache as ram to
- ram need to set CONFIG_LB_MEM_TOPK to 2048 and use var mtrr instead.
+ /* copy data from cache as ram to
+ ram need to set CONFIG_RAMTOP to 2M and use var mtrr instead.
*/
-#if CONFIG_LB_MEM_TOPK <= 1024
- #error "You need to set CONFIG_LB_MEM_TOPK greater than 1024"
+#if CONFIG_RAMTOP <= 0x100000
+ #error "You need to set CONFIG_RAMTOP greater than 1M"
+#endif
+
+#if CONFIG_HAVE_ACPI_RESUME == 1
+ resume_backup_memory = backup_resume();
#endif
-
- set_init_ram_access(); /* So we can access RAM from [1M, CONFIG_LB_MEM_TOPK) */
-// dump_mem(DCACHE_RAM_BASE+DCACHE_RAM_SIZE-0x8000, DCACHE_RAM_BASE+DCACHE_RAM_SIZE-0x7c00);
print_debug("Copying data from cache to RAM -- switching to use RAM as stack... ");
/* from here don't store more data in CAR */
-#if 0
- __asm__ volatile (
- "pushl %eax\n\t"
- );
-#endif
+ vErrata343();
- memcopy((void *)((CONFIG_LB_MEM_TOPK<<10)-DCACHE_RAM_SIZE), (void *)DCACHE_RAM_BASE, DCACHE_RAM_SIZE); //inline
-// dump_mem((CONFIG_LB_MEM_TOPK<<10) - 0x8000, (CONFIG_LB_MEM_TOPK<<10) - 0x7c00);
-
- __asm__ volatile (
- /* set new esp */ /* before _RAMBASE */
- "subl %0, %%ebp\n\t"
- "subl %0, %%esp\n\t"
- ::"a"( (DCACHE_RAM_BASE + DCACHE_RAM_SIZE)- (CONFIG_LB_MEM_TOPK<<10) )
- ); // We need to push %eax to the stack (CAR) before copy stack and pop it later after copy stack and change esp
-#if 0
- __asm__ volatile (
- "popl %eax\n\t"
- );
-#endif
+ memcopy((void *)((CONFIG_RAMTOP)-CONFIG_DCACHE_RAM_SIZE), (void *)CONFIG_DCACHE_RAM_BASE, CONFIG_DCACHE_RAM_SIZE); //inline
+ __asm__ volatile (
+ /* set new esp */ /* before CONFIG_RAMBASE */
+ "subl %0, %%esp\n\t"
+ ::"a"( (CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE)- (CONFIG_RAMTOP) )
+ /* discard all registers (eax is used for %0), so gcc redo everything
+ after the stack is moved */
+ : "cc", "memory", "%ebx", "%ecx", "%edx", "%esi", "%edi", "%ebp"
+ );
/* We can put data to stack again */
- /* only global variable sysinfo in cache need to be offset */
- print_debug("Done\r\n");
- print_debug_pcar("testx = ", testx);
+ /* only global variable sysinfo in cache need to be offset */
+ print_debug("Done\n");
+ print_debug_pcar("testx = ", testx);
- print_debug("Disabling cache as ram now \r\n");
- disable_cache_as_ram_bsp();
+ print_debug("Disabling cache as ram now \n");
- print_debug("Clearing initial memory region: ");
- clear_init_ram(); //except the range from [(CONFIG_LB_MEM_TOPK<<10) - DCACHE_RAM_SIZE, (CONFIG_LB_MEM_TOPK<<10))
- print_debug("Done\r\n");
+ disable_cache_as_ram_bsp();
-// dump_mem((CONFIG_LB_MEM_TOPK<<10) - 0x8000, (CONFIG_LB_MEM_TOPK<<10) - 0x7c00);
+ disable_cache();
+ set_var_mtrr(0, 0x00000000, CONFIG_RAMTOP, MTRR_TYPE_WRBACK);
+ enable_cache();
-#ifndef MEM_TRAIN_SEQ
-#define MEM_TRAIN_SEQ 0
+#if CONFIG_HAVE_ACPI_RESUME == 1
+ /* now copy the rest of the area, using the WB method because we already
+ run normal RAM */
+ if (resume_backup_memory) {
+ memcopy(resume_backup_memory,
+ (void *)(CONFIG_RAMBASE),
+ (CONFIG_RAMTOP) - CONFIG_RAMBASE - CONFIG_DCACHE_RAM_SIZE);
+ }
#endif
- set_sysinfo_in_ram(1); // So other core0 could start to train mem
-#if MEM_TRAIN_SEQ == 1
-// struct sys_info *sysinfox = ((CONFIG_LB_MEM_TOPK<<10) - DCACHE_RAM_GLOBAL_VAR_SIZE);
+ print_debug("Clearing initial memory region: ");
- // wait for ap memory to trained
-// wait_all_core0_mem_trained(sysinfox); // moved to lapic_init_cpus.c
+#if CONFIG_HAVE_ACPI_RESUME == 1
+ /* clear only coreboot used region of memory. Note: this may break ECC enabled boards */
+ memset((void*) CONFIG_RAMBASE, 0, (CONFIG_RAMTOP) - CONFIG_RAMBASE - CONFIG_DCACHE_RAM_SIZE);
+#else
+ memset((void*)0, 0, ((CONFIG_RAMTOP) - CONFIG_DCACHE_RAM_SIZE));
#endif
- /*copy and execute linuxbios_ram */
- copy_and_run();
- /* We will not return */
+ print_debug("Done\n");
- print_debug("should not be here -\r\n");
+ set_sysinfo_in_ram(1); // So other core0 could start to train mem
-}
+#if CONFIG_MEM_TRAIN_SEQ == 1
+// struct sys_info *sysinfox = ((CONFIG_RAMTOP) - CONFIG_DCACHE_RAM_GLOBAL_VAR_SIZE);
+
+ // wait for ap memory to trained
+// wait_all_core0_mem_trained(sysinfox); // moved to lapic_init_cpus.c
+#endif
+ /*copy and execute coreboot_ram */
+ copy_and_run(0);
+ /* We will not return */
+ print_debug("should not be here -\n");
+}
projects / coreboot.git / blobdiff