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authorYork Sun <yorksun@freescale.com>2010-09-28 15:20:33 -0700
committerKumar Gala <galak@kernel.crashing.org>2010-10-20 02:28:00 -0500
commitebbe11dd365b16573e25b1b361287f9539daa33c (patch)
tree17981124c3cbdb2ae4dd8b2ad3bd0288a31655bc /arch/powerpc
parentc02ce6e5a1bc65831c8f638268defa9c6ae70bf1 (diff)
downloadu-boot-linaro-stable-ebbe11dd365b16573e25b1b361287f9539daa33c.tar.gz
Add memory test feature for mpc85xx POST.
The memory test is performed after DDR initialization when U-boot stills runs in flash and cache. On recent mpc85xx platforms, the total memory can be more than 2GB. To cover whole memory, it needs be mapped 2GB at a time using a sliding TLB window. After the testing, DDR is remapped with up to 2GB memory from the lowest address as normal. If memory test fails, DDR DIMM SPD and DDR controller registers are dumped for further debugging. Signed-off-by: York Sun <yorksun@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/cpu/mpc85xx/cpu.c219
1 files changed, 219 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cpu.c b/arch/powerpc/cpu/mpc85xx/cpu.c
index 3f8070071..fc5d951e9 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu.c
@@ -34,6 +34,9 @@
#include <asm/io.h>
#include <asm/mmu.h>
#include <asm/fsl_law.h>
+#include <post.h>
+#include <asm/processor.h>
+#include <asm/fsl_ddr_sdram.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -282,3 +285,219 @@ void mpc85xx_reginfo(void)
print_laws();
print_lbc_regs();
}
+
+#if CONFIG_POST & CONFIG_SYS_POST_MEMORY
+
+/* Board-specific functions defined in each board's ddr.c */
+void fsl_ddr_get_spd(generic_spd_eeprom_t *ctrl_dimms_spd,
+ unsigned int ctrl_num);
+void read_tlbcam_entry(int idx, u32 *valid, u32 *tsize, unsigned long *epn,
+ phys_addr_t *rpn);
+unsigned int
+ setup_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg);
+
+static void dump_spd_ddr_reg(void)
+{
+ int i, j, k, m;
+ u8 *p_8;
+ u32 *p_32;
+ ccsr_ddr_t *ddr[CONFIG_NUM_DDR_CONTROLLERS];
+ generic_spd_eeprom_t
+ spd[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR];
+
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++)
+ fsl_ddr_get_spd(spd[i], i);
+
+ puts("SPD data of all dimms (zero vaule is omitted)...\n");
+ puts("Byte (hex) ");
+ k = 1;
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++)
+ printf("Dimm%d ", k++);
+ }
+ puts("\n");
+ for (k = 0; k < sizeof(generic_spd_eeprom_t); k++) {
+ m = 0;
+ printf("%3d (0x%02x) ", k, k);
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
+ p_8 = (u8 *) &spd[i][j];
+ if (p_8[k]) {
+ printf("0x%02x ", p_8[k]);
+ m++;
+ } else
+ puts(" ");
+ }
+ }
+ if (m)
+ puts("\n");
+ else
+ puts("\r");
+ }
+
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ switch (i) {
+ case 0:
+ ddr[i] = (void *)CONFIG_SYS_MPC85xx_DDR_ADDR;
+ break;
+#ifdef CONFIG_SYS_MPC85xx_DDR2_ADDR
+ case 1:
+ ddr[i] = (void *)CONFIG_SYS_MPC85xx_DDR2_ADDR;
+ break;
+#endif
+ default:
+ printf("%s unexpected controller number = %u\n",
+ __func__, i);
+ return;
+ }
+ }
+ printf("DDR registers dump for all controllers "
+ "(zero vaule is omitted)...\n");
+ puts("Offset (hex) ");
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++)
+ printf(" Base + 0x%04x", (u32)ddr[i] & 0xFFFF);
+ puts("\n");
+ for (k = 0; k < sizeof(ccsr_ddr_t)/4; k++) {
+ m = 0;
+ printf("%6d (0x%04x)", k * 4, k * 4);
+ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
+ p_32 = (u32 *) ddr[i];
+ if (p_32[k]) {
+ printf(" 0x%08x", p_32[k]);
+ m++;
+ } else
+ puts(" ");
+ }
+ if (m)
+ puts("\n");
+ else
+ puts("\r");
+ }
+ puts("\n");
+}
+
+/* invalid the TLBs for DDR and setup new ones to cover p_addr */
+static int reset_tlb(phys_addr_t p_addr, u32 size, phys_addr_t *phys_offset)
+{
+ u32 vstart = CONFIG_SYS_DDR_SDRAM_BASE;
+ unsigned long epn;
+ u32 tsize, valid, ptr;
+ phys_addr_t rpn = 0;
+ int ddr_esel;
+
+ ptr = vstart;
+
+ while (ptr < (vstart + size)) {
+ ddr_esel = find_tlb_idx((void *)ptr, 1);
+ if (ddr_esel != -1) {
+ read_tlbcam_entry(ddr_esel, &valid, &tsize, &epn, &rpn);
+ disable_tlb(ddr_esel);
+ }
+ ptr += TSIZE_TO_BYTES(tsize);
+ }
+
+ /* Setup new tlb to cover the physical address */
+ setup_ddr_tlbs_phys(p_addr, size>>20);
+
+ ptr = vstart;
+ ddr_esel = find_tlb_idx((void *)ptr, 1);
+ if (ddr_esel != -1) {
+ read_tlbcam_entry(ddr_esel, &valid, &tsize, &epn, phys_offset);
+ } else {
+ printf("TLB error in function %s\n", __func__);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * slide the testing window up to test another area
+ * for 32_bit system, the maximum testable memory is limited to
+ * CONFIG_MAX_MEM_MAPPED
+ */
+int arch_memory_test_advance(u32 *vstart, u32 *size, phys_addr_t *phys_offset)
+{
+ phys_addr_t test_cap, p_addr;
+ phys_size_t p_size = min(gd->ram_size, CONFIG_MAX_MEM_MAPPED);
+
+#if !defined(CONFIG_PHYS_64BIT) || \
+ !defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS) || \
+ (CONFIG_SYS_INIT_RAM_ADDR_PHYS < 0x100000000ull)
+ test_cap = p_size;
+#else
+ test_cap = gd->ram_size;
+#endif
+ p_addr = (*vstart) + (*size) + (*phys_offset);
+ if (p_addr < test_cap - 1) {
+ p_size = min(test_cap - p_addr, CONFIG_MAX_MEM_MAPPED);
+ if (reset_tlb(p_addr, p_size, phys_offset) == -1)
+ return -1;
+ *vstart = CONFIG_SYS_DDR_SDRAM_BASE;
+ *size = (u32) p_size;
+ printf("Testing 0x%08llx - 0x%08llx\n",
+ (u64)(*vstart) + (*phys_offset),
+ (u64)(*vstart) + (*phys_offset) + (*size) - 1);
+ } else
+ return 1;
+
+ return 0;
+}
+
+/* initialization for testing area */
+int arch_memory_test_prepare(u32 *vstart, u32 *size, phys_addr_t *phys_offset)
+{
+ phys_size_t p_size = min(gd->ram_size, CONFIG_MAX_MEM_MAPPED);
+
+ *vstart = CONFIG_SYS_DDR_SDRAM_BASE;
+ *size = (u32) p_size; /* CONFIG_MAX_MEM_MAPPED < 4G */
+ *phys_offset = 0;
+
+#if !defined(CONFIG_PHYS_64BIT) || \
+ !defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS) || \
+ (CONFIG_SYS_INIT_RAM_ADDR_PHYS < 0x100000000ull)
+ if (gd->ram_size > CONFIG_MAX_MEM_MAPPED) {
+ puts("Cannot test more than ");
+ print_size(CONFIG_MAX_MEM_MAPPED,
+ " without proper 36BIT support.\n");
+ }
+#endif
+ printf("Testing 0x%08llx - 0x%08llx\n",
+ (u64)(*vstart) + (*phys_offset),
+ (u64)(*vstart) + (*phys_offset) + (*size) - 1);
+
+ return 0;
+}
+
+/* invalid TLBs for DDR and remap as normal after testing */
+int arch_memory_test_cleanup(u32 *vstart, u32 *size, phys_addr_t *phys_offset)
+{
+ unsigned long epn;
+ u32 tsize, valid, ptr;
+ phys_addr_t rpn = 0;
+ int ddr_esel;
+
+ /* disable the TLBs for this testing */
+ ptr = *vstart;
+
+ while (ptr < (*vstart) + (*size)) {
+ ddr_esel = find_tlb_idx((void *)ptr, 1);
+ if (ddr_esel != -1) {
+ read_tlbcam_entry(ddr_esel, &valid, &tsize, &epn, &rpn);
+ disable_tlb(ddr_esel);
+ }
+ ptr += TSIZE_TO_BYTES(tsize);
+ }
+
+ puts("Remap DDR ");
+ setup_ddr_tlbs(gd->ram_size>>20);
+ puts("\n");
+
+ return 0;
+}
+
+void arch_memory_failure_handle(void)
+{
+ dump_spd_ddr_reg();
+}
+#endif