diff options
Diffstat (limited to 'cpu/ppc4xx/44x_spd_ddr.c')
| -rw-r--r-- | cpu/ppc4xx/44x_spd_ddr.c | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/cpu/ppc4xx/44x_spd_ddr.c b/cpu/ppc4xx/44x_spd_ddr.c index 32d44db..10b4c18 100644 --- a/cpu/ppc4xx/44x_spd_ddr.c +++ b/cpu/ppc4xx/44x_spd_ddr.c @@ -46,6 +46,7 @@ #include <asm/processor.h> #include <i2c.h> #include <ppc4xx.h> +#include <asm/mmu.h> #if defined(CONFIG_SPD_EEPROM) && \ (defined(CONFIG_440GP) || defined(CONFIG_440GX) || \ @@ -229,6 +230,22 @@ #define TRUE 1 #define FALSE 0 +/* + * This DDR2 setup code can dynamically setup the TLB entries for the DDR2 memory + * region. Right now the cache should still be disabled in U-Boot because of the + * EMAC driver, that need it's buffer descriptor to be located in non cached + * memory. + * + * If at some time this restriction doesn't apply anymore, just define + * CFG_ENABLE_SDRAM_CACHE in the board config file and this code should setup + * everything correctly. + */ +#ifdef CFG_ENABLE_SDRAM_CACHE +#define MY_TLB_WORD2_I_ENABLE 0 /* enable caching on SDRAM */ +#else +#define MY_TLB_WORD2_I_ENABLE TLB_WORD2_I_ENABLE /* disable caching on SDRAM */ +#endif + const unsigned long test[NUMMEMTESTS][NUMMEMWORDS] = { {0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF}, @@ -259,6 +276,7 @@ typedef struct bank_param BANKPARMS; #ifdef CFG_SIMULATE_SPD_EEPROM extern unsigned char cfg_simulate_spd_eeprom[128]; #endif +void program_tlb(u32 start, u32 size, u32 tlb_word2_i_value); unsigned char spd_read(uchar chip, uint addr); @@ -377,6 +395,11 @@ long int spd_sdram(void) { total_size = program_bxcr(dimm_populated, iic0_dimm_addr, num_dimm_banks); +#ifdef CONFIG_PROG_SDRAM_TLB /* this define should eventually be removed */ + /* and program tlb entries for this size (dynamic) */ + program_tlb(0, total_size, MY_TLB_WORD2_I_ENABLE); +#endif + /* * program SDRAM Clock Timing Register (SDRAM0_CLKTR) */ @@ -1330,11 +1353,11 @@ unsigned long program_bxcr(unsigned long* dimm_populated, */ cr |= SDRAM_BXCR_SDBE; - for (i = 0; i < num_banks; i++) { - bank_parms[ctrl_bank_num[dimm_num]+i].bank_size_bytes = + for (i = 0; i < num_banks; i++) { + bank_parms[ctrl_bank_num[dimm_num]+i+dimm_num].bank_size_bytes = (4 * 1024 * 1024) * bank_size_id; - bank_parms[ctrl_bank_num[dimm_num]+i].cr = cr; - } + bank_parms[ctrl_bank_num[dimm_num]+i+dimm_num].cr = cr; + } } } |