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-rw-r--r--cpu/ppc4xx/44x_spd_ddr2.c456
1 files changed, 249 insertions, 207 deletions
diff --git a/cpu/ppc4xx/44x_spd_ddr2.c b/cpu/ppc4xx/44x_spd_ddr2.c
index 2ab2336..736e3cb 100644
--- a/cpu/ppc4xx/44x_spd_ddr2.c
+++ b/cpu/ppc4xx/44x_spd_ddr2.c
@@ -48,8 +48,6 @@
#include <asm/mmu.h>
#include <asm/cache.h>
-#include "ecc.h"
-
#if defined(CONFIG_SDRAM_PPC4xx_IBM_DDR2)
#define PPC4xx_IBM_DDR2_DUMP_REGISTER(mnemonic) \
@@ -86,8 +84,240 @@
/* disable caching on SDRAM */
#define MY_TLB_WORD2_I_ENABLE TLB_WORD2_I_ENABLE
#endif /* CONFIG_4xx_DCACHE */
+
+void dcbz_area(u32 start_address, u32 num_bytes);
#endif /* CONFIG_440 */
+#define MAXRANKS 4
+#define MAXBXCF 4
+
+#define MULDIV64(m1, m2, d) (u32)(((u64)(m1) * (u64)(m2)) / (u64)(d))
+
+static unsigned long is_ecc_enabled(void);
+
+/*-----------------------------------------------------------------------------+
+ * wait_ddr_idle
+ *-----------------------------------------------------------------------------*/
+static void wait_ddr_idle(void)
+{
+ u32 val;
+
+ do {
+ mfsdram(SDRAM_MCSTAT, val);
+ } while ((val & SDRAM_MCSTAT_IDLE_MASK) == SDRAM_MCSTAT_IDLE_NOT);
+}
+
+/*-----------------------------------------------------------------------------+
+ * sdram_memsize
+ *-----------------------------------------------------------------------------*/
+static phys_size_t sdram_memsize(void)
+{
+ phys_size_t mem_size;
+ unsigned long mcopt2;
+ unsigned long mcstat;
+ unsigned long mb0cf;
+ unsigned long sdsz;
+ unsigned long i;
+
+ mem_size = 0;
+
+ mfsdram(SDRAM_MCOPT2, mcopt2);
+ mfsdram(SDRAM_MCSTAT, mcstat);
+
+ /* DDR controller must be enabled and not in self-refresh. */
+ /* Otherwise memsize is zero. */
+ if (((mcopt2 & SDRAM_MCOPT2_DCEN_MASK) == SDRAM_MCOPT2_DCEN_ENABLE)
+ && ((mcopt2 & SDRAM_MCOPT2_SREN_MASK) == SDRAM_MCOPT2_SREN_EXIT)
+ && ((mcstat & (SDRAM_MCSTAT_MIC_MASK | SDRAM_MCSTAT_SRMS_MASK))
+ == (SDRAM_MCSTAT_MIC_COMP | SDRAM_MCSTAT_SRMS_NOT_SF))) {
+ for (i = 0; i < MAXBXCF; i++) {
+ mfsdram(SDRAM_MB0CF + (i << 2), mb0cf);
+ /* Banks enabled */
+ if ((mb0cf & SDRAM_BXCF_M_BE_MASK) == SDRAM_BXCF_M_BE_ENABLE) {
+#if defined(CONFIG_440)
+ sdsz = mfdcr_any(SDRAM_R0BAS + i) & SDRAM_RXBAS_SDSZ_MASK;
+#else
+ sdsz = mb0cf & SDRAM_RXBAS_SDSZ_MASK;
+#endif
+ switch(sdsz) {
+ case SDRAM_RXBAS_SDSZ_8:
+ mem_size+=8;
+ break;
+ case SDRAM_RXBAS_SDSZ_16:
+ mem_size+=16;
+ break;
+ case SDRAM_RXBAS_SDSZ_32:
+ mem_size+=32;
+ break;
+ case SDRAM_RXBAS_SDSZ_64:
+ mem_size+=64;
+ break;
+ case SDRAM_RXBAS_SDSZ_128:
+ mem_size+=128;
+ break;
+ case SDRAM_RXBAS_SDSZ_256:
+ mem_size+=256;
+ break;
+ case SDRAM_RXBAS_SDSZ_512:
+ mem_size+=512;
+ break;
+ case SDRAM_RXBAS_SDSZ_1024:
+ mem_size+=1024;
+ break;
+ case SDRAM_RXBAS_SDSZ_2048:
+ mem_size+=2048;
+ break;
+ case SDRAM_RXBAS_SDSZ_4096:
+ mem_size+=4096;
+ break;
+ default:
+ printf("WARNING: Unsupported bank size (SDSZ=0x%lx)!\n"
+ , sdsz);
+ mem_size=0;
+ break;
+ }
+ }
+ }
+ }
+
+ return mem_size << 20;
+}
+
+/*-----------------------------------------------------------------------------+
+ * board_add_ram_info
+ *-----------------------------------------------------------------------------*/
+void board_add_ram_info(int use_default)
+{
+ PPC4xx_SYS_INFO board_cfg;
+ u32 val;
+
+ if (is_ecc_enabled())
+ puts(" (ECC");
+ else
+ puts(" (ECC not");
+
+ get_sys_info(&board_cfg);
+
+#if defined(CONFIG_440)
+ mfsdr(SDR0_DDR0, val);
+ val = MULDIV64((board_cfg.freqPLB), SDR0_DDR0_DDRM_DECODE(val), 1);
+#else
+ mfsdr(SDR0_SDSTP0, val);
+ val = MULDIV64((board_cfg.freqPLB), SDR0_SDSTP0_PLB2xDV0_DECODE(val), 1);
+#endif
+ printf(" enabled, %d MHz", (val * 2) / 1000000);
+
+ mfsdram(SDRAM_MMODE, val);
+ val = (val & SDRAM_MMODE_DCL_MASK) >> 4;
+ printf(", CL%d)", val);
+}
+
+#ifdef CONFIG_DDR_ECC
+/*-----------------------------------------------------------------------------+
+ * program_ecc_addr.
+ *-----------------------------------------------------------------------------*/
+static void program_ecc_addr(unsigned long start_address,
+ unsigned long num_bytes,
+ unsigned long tlb_word2_i_value)
+{
+ unsigned long current_address;
+ unsigned long end_address;
+ unsigned long address_increment;
+ unsigned long mcopt1;
+ char str[] = "ECC generation -";
+ char slash[] = "\\|/-\\|/-";
+ int loop = 0;
+ int loopi = 0;
+
+ current_address = start_address;
+ mfsdram(SDRAM_MCOPT1, mcopt1);
+ if ((mcopt1 & SDRAM_MCOPT1_MCHK_MASK) != SDRAM_MCOPT1_MCHK_NON) {
+ mtsdram(SDRAM_MCOPT1,
+ (mcopt1 & ~SDRAM_MCOPT1_MCHK_MASK) | SDRAM_MCOPT1_MCHK_GEN);
+ sync();
+ eieio();
+ wait_ddr_idle();
+
+ puts(str);
+
+#ifdef CONFIG_440
+ if (tlb_word2_i_value == TLB_WORD2_I_ENABLE) {
+#endif
+ /* ECC bit set method for non-cached memory */
+ if ((mcopt1 & SDRAM_MCOPT1_DMWD_MASK) == SDRAM_MCOPT1_DMWD_32)
+ address_increment = 4;
+ else
+ address_increment = 8;
+ end_address = current_address + num_bytes;
+
+ while (current_address < end_address) {
+ *((unsigned long *)current_address) = 0x00000000;
+ current_address += address_increment;
+
+ if ((loop++ % (2 << 20)) == 0) {
+ putc('\b');
+ putc(slash[loopi++ % 8]);
+ }
+ }
+#ifdef CONFIG_440
+ } else {
+ /* ECC bit set method for cached memory */
+ dcbz_area(start_address, num_bytes);
+ /* Write modified dcache lines back to memory */
+ clean_dcache_range(start_address, start_address + num_bytes);
+ }
+#endif /* CONFIG_440 */
+
+ blank_string(strlen(str));
+
+ sync();
+ eieio();
+ wait_ddr_idle();
+
+ /* clear ECC error repoting registers */
+ mtsdram(SDRAM_ECCCR, 0xffffffff);
+ mtdcr(0x4c, 0xffffffff);
+
+ mtsdram(SDRAM_MCOPT1,
+ (mcopt1 & ~SDRAM_MCOPT1_MCHK_MASK) | SDRAM_MCOPT1_MCHK_CHK_REP);
+ sync();
+ eieio();
+ wait_ddr_idle();
+ }
+}
+
+/*-----------------------------------------------------------------------------+
+ * do_program_ecc.
+ *-----------------------------------------------------------------------------*/
+static void do_program_ecc(unsigned long tlb_word2_i_value)
+{
+ unsigned long mcopt1;
+ unsigned long mcopt2;
+ unsigned long mcstat;
+ phys_size_t memsize = sdram_memsize();
+
+ if (memsize > CONFIG_MAX_MEM_MAPPED) {
+ printf("\nWarning: Can't enable ECC on systems with more than 2GB of SDRAM!\n");
+ return;
+ }
+
+ mfsdram(SDRAM_MCOPT1, mcopt1);
+ mfsdram(SDRAM_MCOPT2, mcopt2);
+
+ if ((mcopt1 & SDRAM_MCOPT1_MCHK_MASK) != SDRAM_MCOPT1_MCHK_NON) {
+ /* DDR controller must be enabled and not in self-refresh. */
+ mfsdram(SDRAM_MCSTAT, mcstat);
+ if (((mcopt2 & SDRAM_MCOPT2_DCEN_MASK) == SDRAM_MCOPT2_DCEN_ENABLE)
+ && ((mcopt2 & SDRAM_MCOPT2_SREN_MASK) == SDRAM_MCOPT2_SREN_EXIT)
+ && ((mcstat & (SDRAM_MCSTAT_MIC_MASK | SDRAM_MCSTAT_SRMS_MASK))
+ == (SDRAM_MCSTAT_MIC_COMP | SDRAM_MCSTAT_SRMS_NOT_SF))) {
+
+ program_ecc_addr(0, memsize, tlb_word2_i_value);
+ }
+ }
+}
+#endif /* CONFIG_DDR_ECC */
+
#if defined(CONFIG_SPD_EEPROM)
/*-----------------------------------------------------------------------------+
@@ -105,14 +335,10 @@
#define SDRAM_NONE 0
#define MAXDIMMS 2
-#define MAXRANKS 4
-#define MAXBXCF 4
#define MAX_SPD_BYTES 256 /* Max number of bytes on the DIMM's SPD EEPROM */
#define ONE_BILLION 1000000000
-#define MULDIV64(m1, m2, d) (u32)(((u64)(m1) * (u64)(m2)) / (u64)(d))
-
#define CMD_NOP (7 << 19)
#define CMD_PRECHARGE (2 << 19)
#define CMD_REFRESH (1 << 19)
@@ -257,15 +483,11 @@ static void program_initplr(unsigned long *dimm_populated,
unsigned long num_dimm_banks,
ddr_cas_id_t selected_cas,
int write_recovery);
-static unsigned long is_ecc_enabled(void);
#ifdef CONFIG_DDR_ECC
static void program_ecc(unsigned long *dimm_populated,
unsigned char *iic0_dimm_addr,
unsigned long num_dimm_banks,
unsigned long tlb_word2_i_value);
-static void program_ecc_addr(unsigned long start_address,
- unsigned long num_bytes,
- unsigned long tlb_word2_i_value);
#endif
#if !defined(CONFIG_PPC4xx_DDR_AUTOCALIBRATION)
static void program_DQS_calibration(unsigned long *dimm_populated,
@@ -278,7 +500,6 @@ static void DQS_calibration_process(void);
#endif
#endif
int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
-void dcbz_area(u32 start_address, u32 num_bytes);
static unsigned char spd_read(uchar chip, uint addr)
{
@@ -292,79 +513,6 @@ static unsigned char spd_read(uchar chip, uint addr)
}
/*-----------------------------------------------------------------------------+
- * sdram_memsize
- *-----------------------------------------------------------------------------*/
-static phys_size_t sdram_memsize(void)
-{
- phys_size_t mem_size;
- unsigned long mcopt2;
- unsigned long mcstat;
- unsigned long mb0cf;
- unsigned long sdsz;
- unsigned long i;
-
- mem_size = 0;
-
- mfsdram(SDRAM_MCOPT2, mcopt2);
- mfsdram(SDRAM_MCSTAT, mcstat);
-
- /* DDR controller must be enabled and not in self-refresh. */
- /* Otherwise memsize is zero. */
- if (((mcopt2 & SDRAM_MCOPT2_DCEN_MASK) == SDRAM_MCOPT2_DCEN_ENABLE)
- && ((mcopt2 & SDRAM_MCOPT2_SREN_MASK) == SDRAM_MCOPT2_SREN_EXIT)
- && ((mcstat & (SDRAM_MCSTAT_MIC_MASK | SDRAM_MCSTAT_SRMS_MASK))
- == (SDRAM_MCSTAT_MIC_COMP | SDRAM_MCSTAT_SRMS_NOT_SF))) {
- for (i = 0; i < MAXBXCF; i++) {
- mfsdram(SDRAM_MB0CF + (i << 2), mb0cf);
- /* Banks enabled */
- if ((mb0cf & SDRAM_BXCF_M_BE_MASK) == SDRAM_BXCF_M_BE_ENABLE) {
- sdsz = mfdcr_any(SDRAM_R0BAS + i) & SDRAM_RXBAS_SDSZ_MASK;
-
- switch(sdsz) {
- case SDRAM_RXBAS_SDSZ_8:
- mem_size+=8;
- break;
- case SDRAM_RXBAS_SDSZ_16:
- mem_size+=16;
- break;
- case SDRAM_RXBAS_SDSZ_32:
- mem_size+=32;
- break;
- case SDRAM_RXBAS_SDSZ_64:
- mem_size+=64;
- break;
- case SDRAM_RXBAS_SDSZ_128:
- mem_size+=128;
- break;
- case SDRAM_RXBAS_SDSZ_256:
- mem_size+=256;
- break;
- case SDRAM_RXBAS_SDSZ_512:
- mem_size+=512;
- break;
- case SDRAM_RXBAS_SDSZ_1024:
- mem_size+=1024;
- break;
- case SDRAM_RXBAS_SDSZ_2048:
- mem_size+=2048;
- break;
- case SDRAM_RXBAS_SDSZ_4096:
- mem_size+=4096;
- break;
- default:
- printf("WARNING: Unsupported bank size (SDSZ=0x%lx)!\n"
- , sdsz);
- mem_size=0;
- break;
- }
- }
- }
- }
-
- return mem_size << 20;
-}
-
-/*-----------------------------------------------------------------------------+
* initdram. Initializes the 440SP Memory Queue and DDR SDRAM controller.
* Note: This routine runs from flash with a stack set up in the chip's
* sram space. It is important that the routine does not require .sbss, .bss or
@@ -643,26 +791,6 @@ static void get_spd_info(unsigned long *dimm_populated,
}
}
-void board_add_ram_info(int use_default)
-{
- PPC4xx_SYS_INFO board_cfg;
- u32 val;
-
- if (is_ecc_enabled())
- puts(" (ECC");
- else
- puts(" (ECC not");
-
- get_sys_info(&board_cfg);
-
- mfsdr(SDR0_DDR0, val);
- val = MULDIV64((board_cfg.freqPLB), SDR0_DDR0_DDRM_DECODE(val), 1);
- printf(" enabled, %d MHz", (val * 2) / 1000000);
-
- mfsdram(SDRAM_MMODE, val);
- val = (val & SDRAM_MMODE_DCL_MASK) >> 4;
- printf(", CL%d)", val);
-}
/*------------------------------------------------------------------
* For the memory DIMMs installed, this routine verifies that they
@@ -2305,9 +2433,6 @@ static void program_ecc(unsigned long *dimm_populated,
unsigned long num_dimm_banks,
unsigned long tlb_word2_i_value)
{
- unsigned long mcopt1;
- unsigned long mcopt2;
- unsigned long mcstat;
unsigned long dimm_num;
unsigned long ecc;
@@ -2321,105 +2446,7 @@ static void program_ecc(unsigned long *dimm_populated,
if (ecc == 0)
return;
- if (sdram_memsize() > CONFIG_MAX_MEM_MAPPED) {
- printf("\nWarning: Can't enable ECC on systems with more than 2GB of SDRAM!\n");
- return;
- }
-
- mfsdram(SDRAM_MCOPT1, mcopt1);
- mfsdram(SDRAM_MCOPT2, mcopt2);
-
- if ((mcopt1 & SDRAM_MCOPT1_MCHK_MASK) != SDRAM_MCOPT1_MCHK_NON) {
- /* DDR controller must be enabled and not in self-refresh. */
- mfsdram(SDRAM_MCSTAT, mcstat);
- if (((mcopt2 & SDRAM_MCOPT2_DCEN_MASK) == SDRAM_MCOPT2_DCEN_ENABLE)
- && ((mcopt2 & SDRAM_MCOPT2_SREN_MASK) == SDRAM_MCOPT2_SREN_EXIT)
- && ((mcstat & (SDRAM_MCSTAT_MIC_MASK | SDRAM_MCSTAT_SRMS_MASK))
- == (SDRAM_MCSTAT_MIC_COMP | SDRAM_MCSTAT_SRMS_NOT_SF))) {
-
- program_ecc_addr(0, sdram_memsize(), tlb_word2_i_value);
- }
- }
-
- return;
-}
-
-static void wait_ddr_idle(void)
-{
- u32 val;
-
- do {
- mfsdram(SDRAM_MCSTAT, val);
- } while ((val & SDRAM_MCSTAT_IDLE_MASK) == SDRAM_MCSTAT_IDLE_NOT);
-}
-
-/*-----------------------------------------------------------------------------+
- * program_ecc_addr.
- *-----------------------------------------------------------------------------*/
-static void program_ecc_addr(unsigned long start_address,
- unsigned long num_bytes,
- unsigned long tlb_word2_i_value)
-{
- unsigned long current_address;
- unsigned long end_address;
- unsigned long address_increment;
- unsigned long mcopt1;
- char str[] = "ECC generation -";
- char slash[] = "\\|/-\\|/-";
- int loop = 0;
- int loopi = 0;
-
- current_address = start_address;
- mfsdram(SDRAM_MCOPT1, mcopt1);
- if ((mcopt1 & SDRAM_MCOPT1_MCHK_MASK) != SDRAM_MCOPT1_MCHK_NON) {
- mtsdram(SDRAM_MCOPT1,
- (mcopt1 & ~SDRAM_MCOPT1_MCHK_MASK) | SDRAM_MCOPT1_MCHK_GEN);
- sync();
- eieio();
- wait_ddr_idle();
-
- puts(str);
- if (tlb_word2_i_value == TLB_WORD2_I_ENABLE) {
- /* ECC bit set method for non-cached memory */
- if ((mcopt1 & SDRAM_MCOPT1_DMWD_MASK) == SDRAM_MCOPT1_DMWD_32)
- address_increment = 4;
- else
- address_increment = 8;
- end_address = current_address + num_bytes;
-
- while (current_address < end_address) {
- *((unsigned long *)current_address) = 0x00000000;
- current_address += address_increment;
-
- if ((loop++ % (2 << 20)) == 0) {
- putc('\b');
- putc(slash[loopi++ % 8]);
- }
- }
-
- } else {
- /* ECC bit set method for cached memory */
- dcbz_area(start_address, num_bytes);
- /* Write modified dcache lines back to memory */
- clean_dcache_range(start_address, start_address + num_bytes);
- }
-
- blank_string(strlen(str));
-
- sync();
- eieio();
- wait_ddr_idle();
-
- /* clear ECC error repoting registers */
- mtsdram(SDRAM_ECCCR, 0xffffffff);
- mtdcr(0x4c, 0xffffffff);
-
- mtsdram(SDRAM_MCOPT1,
- (mcopt1 & ~SDRAM_MCOPT1_MCHK_MASK) | SDRAM_MCOPT1_MCHK_CHK_REP);
- sync();
- eieio();
- wait_ddr_idle();
- }
+ do_program_ecc(tlb_word2_i_value);
}
#endif
@@ -2962,6 +2989,21 @@ static void test(void)
#else /* CONFIG_SPD_EEPROM */
+/*-----------------------------------------------------------------------------+
+ * is_ecc_enabled
+ *-----------------------------------------------------------------------------*/
+static unsigned long is_ecc_enabled(void)
+{
+ unsigned long ecc;
+ unsigned long val;
+
+ ecc = 0;
+ mfsdram(SDRAM_MCOPT1, val);
+ ecc = max(ecc, SDRAM_MCOPT1_MCHK_CHK_DECODE(val));
+
+ return ecc;
+}
+
/*-----------------------------------------------------------------------------
* Function: initdram
* Description: Configures the PPC4xx IBM DDR1/DDR2 SDRAM memory controller.
@@ -3106,7 +3148,7 @@ phys_size_t initdram(int board_type)
#endif /* CONFIG_PPC4xx_DDR_AUTOCALIBRATION */
#if defined(CONFIG_DDR_ECC)
- ecc_init(CONFIG_SYS_SDRAM_BASE, CONFIG_SYS_MBYTES_SDRAM << 20);
+ do_program_ecc(0);
#endif /* defined(CONFIG_DDR_ECC) */
#if defined(CONFIG_440)
generated by cgit v1.1 at 2024-11-24 20:33:33 +0000