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authorGreg Watson <jarrah@users.sourceforge.net>2003-11-02 16:59:24 +0000
committerGreg Watson <jarrah@users.sourceforge.net>2003-11-02 16:59:24 +0000
commit5bcd408b8e72a582bfad61da827a51c2349d037a (patch)
treed0ce10dd06935309b695301c98f4769e93d5b7ab /src/cpu/ppc/ppc4xx
parent6f2e86d2782425e8e5b902c2a2958cda4666f471 (diff)
Do sdram setup for fixed memory sizes. This really only works on
embedded boards that have fixed memory configuration. git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1240 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/cpu/ppc/ppc4xx')
-rw-r--r--src/cpu/ppc/ppc4xx/sdram.c206
1 files changed, 16 insertions, 190 deletions
diff --git a/src/cpu/ppc/ppc4xx/sdram.c b/src/cpu/ppc/ppc4xx/sdram.c
index c4395e7885..5de2ab029c 100644
--- a/src/cpu/ppc/ppc4xx/sdram.c
+++ b/src/cpu/ppc/ppc4xx/sdram.c
@@ -24,31 +24,14 @@
#include <ppc_asm.tmpl>
#include <ppc.h>
#include <ppc4xx.h>
+#include <timer.h>
+#include <clock.h>
#define CONFIG_SDRAM_BANK0
#ifdef CONFIG_SDRAM_BANK0
-
-#define MAGIC0 0x00000000
-#define MAGIC1 0x11111111
-#define MAGIC2 0x22222222
-#define MAGIC3 0x33333333
-#define MAGIC4 0x44444444
-#define MAGIC5 0x55555555
-#define MAGIC6 0x66666666
-
-#define ADDR_ZERO 0x00000000
-#define ADDR_400 0x00000400
-#define ADDR_01MB 0x00100000
-#define ADDR_08MB 0x00800000
-#define ADDR_16MB 0x01000000
-#define ADDR_32MB 0x02000000
-#define ADDR_64MB 0x04000000
-#define ADDR_128MB 0x08000000
-
#define mtsdram0(reg, data) mtdcr(memcfga,reg);mtdcr(memcfgd,data)
-
/*-----------------------------------------------------------------------
*/
void sdram_init(void)
@@ -60,7 +43,7 @@ void sdram_init(void)
/*
* Determine SDRAM speed
*/
- speed = get_bus_freq(0); /* parameter not used on ppc4xx */
+ speed = get_bus_freq(); /* parameter not used on ppc4xx */
/*
* Support for 100MHz and 133MHz SDRAM
@@ -79,6 +62,13 @@ void sdram_init(void)
rtr = 0x05f00000;
}
+ /*
+ * Disable memory controller.
+ */
+/* TODO: work out why this trashes cache ram */
+ //mtsdram0(mem_mcopt1, 0x00000000);
+
+#if EMBEDDED_RAM_SIZE==128*1024*1024
/*
* Set MB0CF for bank 0. (0-128MB) Address Mode 3 since 13x10(4)
*/
@@ -86,52 +76,7 @@ void sdram_init(void)
mtsdram0(mem_sdtr1, sdtr1);
mtsdram0(mem_rtr, rtr);
-
- /*
- * Wait for 200us
- */
- udelay(200);
-
- /*
- * Set memory controller options reg, MCOPT1.
- * Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst
- * read/prefetch.
- */
- mtsdram0(mem_mcopt1, 0x80800000);
-
- /*
- * Wait for 10ms
- */
- udelay(10000);
-
- /*
- * Test if 128 MByte are equipped (mirror test)
- */
- *(volatile unsigned long *)ADDR_ZERO = MAGIC0;
- *(volatile unsigned long *)ADDR_08MB = MAGIC1;
- *(volatile unsigned long *)ADDR_16MB = MAGIC2;
- *(volatile unsigned long *)ADDR_32MB = MAGIC3;
- *(volatile unsigned long *)ADDR_64MB = MAGIC4;
-
- if ((*(volatile unsigned long *)ADDR_ZERO == MAGIC0) &&
- (*(volatile unsigned long *)ADDR_08MB == MAGIC1) &&
- (*(volatile unsigned long *)ADDR_16MB == MAGIC2) &&
- (*(volatile unsigned long *)ADDR_32MB == MAGIC3)) {
- /*
- * OK, 128MB detected -> all done
- */
- return;
- }
-
- /*
- * Now test for 64 MByte...
- */
-
- /*
- * Disable memory controller.
- */
- mtsdram0(mem_mcopt1, 0x00000000);
-
+#elif EMBEDDED_RAM_SIZE==64*1024*1024
/*
* Set MB0CF for bank 0. (0-64MB) Address Mode 3 since 13x9(4)
*/
@@ -139,141 +84,22 @@ void sdram_init(void)
mtsdram0(mem_sdtr1, sdtr1);
mtsdram0(mem_rtr, rtr);
-
- /*
- * Wait for 200us
- */
- udelay(200);
-
- /*
- * Set memory controller options reg, MCOPT1.
- * Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst
- * read/prefetch.
- */
- mtsdram0(mem_mcopt1, 0x80800000);
-
- /*
- * Wait for 10ms
- */
- udelay(10000);
-
- /*
- * Test if 64 MByte are equipped (mirror test)
- */
- *(volatile unsigned long *)ADDR_ZERO = MAGIC0;
- *(volatile unsigned long *)ADDR_08MB = MAGIC1;
- *(volatile unsigned long *)ADDR_16MB = MAGIC2;
- *(volatile unsigned long *)ADDR_32MB = MAGIC3;
-
- if ((*(volatile unsigned long *)ADDR_ZERO == MAGIC0) &&
- (*(volatile unsigned long *)ADDR_08MB == MAGIC1) &&
- (*(volatile unsigned long *)ADDR_16MB == MAGIC2)) {
- /*
- * OK, 64MB detected -> all done
- */
- return;
- }
-
- /*
- * Now test for 32 MByte...
- */
-
- /*
- * Disable memory controller.
- */
- mtsdram0(mem_mcopt1, 0x00000000);
-
+#elif EMBEDDED_RAM_SIZE==32*1024*1024
/*
* Set MB0CF for bank 0. (0-32MB) Address Mode 2 since 12x9(4)
*/
mtsdram0(mem_mb0cf, 0x00062001);
-
- /*
- * Set memory controller options reg, MCOPT1.
- * Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst
- * read/prefetch.
- */
- mtsdram0(mem_mcopt1, 0x80800000);
-
- /*
- * Wait for 10ms
- */
- udelay(10000);
-
- /*
- * Test if 32 MByte are equipped (mirror test)
- */
- *(volatile unsigned long *)ADDR_ZERO = MAGIC0;
- *(volatile unsigned long *)ADDR_400 = MAGIC1;
- *(volatile unsigned long *)ADDR_08MB = MAGIC2;
- *(volatile unsigned long *)ADDR_16MB = MAGIC3;
-
- if ((*(volatile unsigned long *)ADDR_ZERO == MAGIC0) &&
- (*(volatile unsigned long *)ADDR_400 == MAGIC1) &&
- (*(volatile unsigned long *)ADDR_08MB == MAGIC2)) {
- /*
- * OK, 32MB detected -> all done
- */
- return;
- }
-
- /*
- * Now test for 16 MByte...
- */
- /*
- * Disable memory controller.
- */
- mtsdram0(mem_mcopt1, 0x00000000);
-
+#elif EMBEDDED_RAM_SIZE==16*1024*1024
/*
* Set MB0CF for bank 0. (0-16MB) Address Mode 4 since 12x8(4)
*/
mtsdram0(mem_mb0cf, 0x00046001);
+#endif
/*
- * Set memory controller options reg, MCOPT1.
- * Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst
- * read/prefetch.
- */
- mtsdram0(mem_mcopt1, 0x80800000);
-
- /*
- * Wait for 10ms
- */
- udelay(10000);
-
- /*
- * Test if 16 MByte are equipped (mirror test)
- */
- *(volatile unsigned long *)ADDR_ZERO = MAGIC0;
- *(volatile unsigned long *)ADDR_400 = MAGIC1;
- *(volatile unsigned long *)ADDR_01MB = MAGIC5;
- *(volatile unsigned long *)ADDR_08MB = MAGIC2;
-/* *(volatile unsigned long *)ADDR_16MB = MAGIC3;*/
-
- if ((*(volatile unsigned long *)ADDR_ZERO == MAGIC0) &&
- (*(volatile unsigned long *)ADDR_400 == MAGIC1) &&
- (*(volatile unsigned long *)ADDR_01MB == MAGIC5) &&
- (*(volatile unsigned long *)ADDR_08MB == MAGIC2)) {
- /*
- * OK, 16MB detected -> all done
- */
- return;
- }
-
- /*
- * Setup for 4 MByte...
- */
-
- /*
- * Disable memory controller.
- */
- mtsdram0(mem_mcopt1, 0x00000000);
-
- /*
- * Set MB0CF for bank 0. (0-4MB) Address Mode 5 since 11x8(2)
+ * Wait for 200us
*/
- mtsdram0(mem_mb0cf, 0x00008001);
+ udelay(200);
/*
* Set memory controller options reg, MCOPT1.