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authorStefan Roese <sr@denx.de>2007-10-31 20:57:11 +0100
committerStefan Roese <sr@denx.de>2007-10-31 21:21:47 +0100
commitea2e142843533ca593fcb5cb3e1daf1b7f5e5949 (patch)
treefb4c89b7d5b706e676c9ab8d4afcaf8d1373c21a
parent3db93b8bedd32e914b38976141b3fdf4ea3ff738 (diff)
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ppc4xx: Add CONFIG_4xx_DCACHE compile options to enable cached SDRAM
This patch adds the CONFIG_4xx_DCACHE options to some SDRAM init files and to the Sequoia TLB init code. Now the cache can be enabled on 44x boards by defining CONFIG_4xx_DCACHE in the board config file. This option will disappear, when more boards use is successfully and no more known problems exist. This is tested successfully on Sequoia and Katmai. The only problem that needs to be fixed is, that USB is not working on Sequoia right now, since it will need some cache handling code too, similar to the 4xx EMAC driver. Signed-off-by: Stefan Roese <sr@denx.de>
-rw-r--r--board/amcc/sequoia/init.S4
-rw-r--r--cpu/ppc4xx/44x_spd_ddr.c9
-rw-r--r--cpu/ppc4xx/44x_spd_ddr2.c4
3 files changed, 9 insertions, 8 deletions
diff --git a/board/amcc/sequoia/init.S b/board/amcc/sequoia/init.S
index 5fe3af9..c7da521 100644
--- a/board/amcc/sequoia/init.S
+++ b/board/amcc/sequoia/init.S
@@ -98,7 +98,11 @@ tlbtab:
#endif
/* TLB-entry for DDR SDRAM (Up to 2GB) */
+#ifdef CONFIG_4xx_DCACHE
+ tlbentry( CFG_SDRAM_BASE, SZ_256M, CFG_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G)
+#else
tlbentry( CFG_SDRAM_BASE, SZ_256M, CFG_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G|SA_I )
+#endif
#ifdef CFG_INIT_RAM_DCACHE
/* TLB-entry for init-ram in dcache (SA_I must be turned off!) */
diff --git a/cpu/ppc4xx/44x_spd_ddr.c b/cpu/ppc4xx/44x_spd_ddr.c
index 65ce46d..b9cf5cb 100644
--- a/cpu/ppc4xx/44x_spd_ddr.c
+++ b/cpu/ppc4xx/44x_spd_ddr.c
@@ -251,10 +251,10 @@ void spd_ddr_init_hang (void) __attribute__((weak, alias("__spd_ddr_init_hang"))
* 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
+ * CONFIG_4xx_DCACHE in the board config file and this code should setup
* everything correctly.
*/
-#ifdef CFG_ENABLE_SDRAM_CACHE
+#ifdef CONFIG_4xx_DCACHE
#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 */
@@ -345,7 +345,7 @@ long int spd_sdram(void) {
*/
check_volt_type(dimm_populated, iic0_dimm_addr, num_dimm_banks);
-#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || defined(CONFIG_440GR) || defined(CONFIG_440SP)
+#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || defined(CONFIG_440GR)
/*
* Soft-reset SDRAM controller.
*/
@@ -1197,9 +1197,6 @@ static void program_tr1(void)
}
rdclt_average = ((max_start + max_end) >> 1);
- if (rdclt_average >= 0x60)
- while (1)
- ;
if (rdclt_average < 0) {
rdclt_average = 0;
diff --git a/cpu/ppc4xx/44x_spd_ddr2.c b/cpu/ppc4xx/44x_spd_ddr2.c
index b341367..e199294 100644
--- a/cpu/ppc4xx/44x_spd_ddr2.c
+++ b/cpu/ppc4xx/44x_spd_ddr2.c
@@ -120,10 +120,10 @@
* 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
+ * CONFIG_4xx_DCACHE in the board config file and this code should setup
* everything correctly.
*/
-#ifdef CFG_ENABLE_SDRAM_CACHE
+#ifdef CONFIG_4xx_DCACHE
#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 */