2 * 2006.3 yhlu add copy data from CAR to ram
5 #include <arch/stages.h>
6 #include <cpu/x86/mtrr.h>
7 #include "cpu/amd/car/disable_cache_as_ram.c"
8 #include "cpu/x86/mtrr/earlymtrr.c"
10 static inline void print_debug_pcar(const char *strval, uint32_t val)
12 printk(BIOS_DEBUG, "%s%08x\n", strval, val);
15 /* from linux kernel 2.6.32 asm/string_32.h */
17 static void inline __attribute__((always_inline)) memcopy(void *dest, const void *src, unsigned long bytes)
20 asm volatile("cld ; rep ; movsl\n\t"
26 : "=&c" (d0), "=&D" (d1), "=&S" (d2)
27 : "0" (bytes / 4), "g" (bytes), "1" ((long)dest), "2" ((long)src)
31 #if CONFIG_HAVE_ACPI_RESUME == 1
33 static inline void *backup_resume(void) {
34 unsigned long high_ram_base;
35 void *resume_backup_memory;
36 int suspend = acpi_is_wakeup_early();
41 /* Start address of high memory tables */
42 high_ram_base = (u32) get_cbmem_toc();
44 print_debug_pcar("CBMEM TOC is at: ", (uint32_t)high_ram_base);
45 print_debug_pcar("CBMEM TOC 0-size: ",(uint32_t)(high_ram_base + HIGH_MEMORY_SIZE + 4096));
47 cbmem_reinit((u64)high_ram_base);
49 resume_backup_memory = cbmem_find(CBMEM_ID_RESUME);
51 /* copy 1MB - 64K to high tables ram_base to prevent memory corruption
52 * through stage 2. We could keep stuff like stack and heap in high tables
53 * memory completely, but that's a wonderful clean up task for another
57 if (resume_backup_memory) {
58 print_debug_pcar("Will copy coreboot region to: ", (uint32_t) resume_backup_memory);
59 /* copy only backup only memory used for CAR */
60 memcopy(resume_backup_memory+HIGH_MEMORY_SAVE-CONFIG_DCACHE_RAM_SIZE,
61 (void *)((CONFIG_RAMTOP)-CONFIG_DCACHE_RAM_SIZE),
62 CONFIG_DCACHE_RAM_SIZE); //inline
65 return resume_backup_memory;
69 /* Disable Erratum 343 Workaround, see RevGuide for Fam10h, Pub#41322 Rev 3.33 */
71 static void vErrata343(void)
75 unsigned int uiMask = 0xFFFFFFF7;
77 msr = rdmsr(BU_CFG2_MSR);
78 msr.hi &= uiMask; // set bit 35 to 0
79 wrmsr(BU_CFG2_MSR, msr);
83 static void post_cache_as_ram(void)
85 #if CONFIG_HAVE_ACPI_RESUME == 1
86 void *resume_backup_memory;
90 /* Check value of esp to verify if we have enough rom for stack in Cache as RAM */
96 print_debug_pcar("v_esp=", v_esp);
100 unsigned testx = 0x5a5a5a5a;
101 print_debug_pcar("testx = ", testx);
103 /* copy data from cache as ram to
104 ram need to set CONFIG_RAMTOP to 2M and use var mtrr instead.
106 #if CONFIG_RAMTOP <= 0x100000
107 #error "You need to set CONFIG_RAMTOP greater than 1M"
110 #if CONFIG_HAVE_ACPI_RESUME == 1
111 resume_backup_memory = backup_resume();
114 print_debug("Copying data from cache to RAM -- switching to use RAM as stack... ");
116 /* from here don't store more data in CAR */
119 memcopy((void *)((CONFIG_RAMTOP)-CONFIG_DCACHE_RAM_SIZE), (void *)CONFIG_DCACHE_RAM_BASE, CONFIG_DCACHE_RAM_SIZE); //inline
122 /* set new esp */ /* before CONFIG_RAMBASE */
124 ::"a"( (CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE)- (CONFIG_RAMTOP) )
125 /* discard all registers (eax is used for %0), so gcc redo everything
126 after the stack is moved */
127 : "cc", "memory", "%ebx", "%ecx", "%edx", "%esi", "%edi", "%ebp"
130 /* We can put data to stack again */
132 /* only global variable sysinfo in cache need to be offset */
133 print_debug("Done\n");
134 print_debug_pcar("testx = ", testx);
136 print_debug("Disabling cache as ram now \n");
138 disable_cache_as_ram_bsp();
141 set_var_mtrr(0, 0x00000000, CONFIG_RAMTOP, MTRR_TYPE_WRBACK);
144 #if CONFIG_HAVE_ACPI_RESUME == 1
145 /* now copy the rest of the area, using the WB method because we already
147 if (resume_backup_memory) {
148 memcopy(resume_backup_memory,
149 (void *)(CONFIG_RAMBASE),
150 (CONFIG_RAMTOP) - CONFIG_RAMBASE - CONFIG_DCACHE_RAM_SIZE);
154 print_debug("Clearing initial memory region: ");
156 #if CONFIG_HAVE_ACPI_RESUME == 1
157 /* clear only coreboot used region of memory. Note: this may break ECC enabled boards */
158 memset((void*) CONFIG_RAMBASE, 0, (CONFIG_RAMTOP) - CONFIG_RAMBASE - CONFIG_DCACHE_RAM_SIZE);
160 memset((void*)0, 0, ((CONFIG_RAMTOP) - CONFIG_DCACHE_RAM_SIZE));
162 print_debug("Done\n");
164 set_sysinfo_in_ram(1); // So other core0 could start to train mem
166 #if CONFIG_MEM_TRAIN_SEQ == 1
167 // struct sys_info *sysinfox = ((CONFIG_RAMTOP) - CONFIG_DCACHE_RAM_GLOBAL_VAR_SIZE);
169 // wait for ap memory to trained
170 // wait_all_core0_mem_trained(sysinfox); // moved to lapic_init_cpus.c
172 /*copy and execute coreboot_ram */
174 /* We will not return */
176 print_debug("should not be here -\n");