size memory

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1192 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 53 insertions, 1 deletions

diff --git a/src/cpu/ppc/ppc4xx/mem.c b/src/cpu/ppc/ppc4xx/mem.c
index 9fa6daa19b..f1bd2f8b8e 100644
--- a/src/cpu/ppc/ppc4xx/mem.c
+++ b/src/cpu/ppc/ppc4xx/mem.c
@@ -1,7 +1,59 @@
+#include	<ppc.h>
 #include	<mem.h>
+#include	<console/console.h>
+
+#define SDRAM0_CFGADDR	0x010
+#define SDRAM0_CFGDATA	0x011
+
+#define SDRAM0_B0CR	0x40
+#define SDRAM0_B1CR	0x44
+#define SDRAM0_B2CR	0x48
+#define SDRAM0_B3CR	0x4C
+
+#define BA_MASK		0xffc00000
+#define BA_SHIFT	22
+#define SZ_MASK		0x000e0000
+#define SZ_SHIFT	17
+#define AM_MASK		0x0000e000
+#define AM_SHIFT	13
+#define BE_MASK		0x00000001
+#define BE_SHIFT	0
+
+struct mem_range	mem_bank[4];
+
+void
+getmemrange(int bank, unsigned int reg)
+{
+	unsigned int val;
+	unsigned int size;
+
+	mtdcr(SDRAM0_CFGADDR, reg);
+	val = mfdcr(SDRAM0_CFGDATA);
+
+	if ((val & BE_MASK) == 0)
+	{
+		mem_bank[bank].basek = 0;
+		mem_bank[bank].sizek = 0;
+		return;
+	}
+
+	size = ((val & BA_MASK) >> BA_SHIFT);
+	mem_bank[bank].basek = size * 1024;
+
+	size = 4 << ((val & SZ_MASK) >> SZ_SHIFT);
+	mem_bank[bank].sizek = size * 1024;
+
+	printk_info("mem bank %d: basek %d, sizek %d\n", bank, mem_bank[bank].basek, mem_bank[bank].sizek);
+}
 
 struct mem_range *
 sizeram(void)
 {
-	return 0;
+	getmemrange(0, SDRAM0_B0CR);
+	getmemrange(1, SDRAM0_B1CR);
+	getmemrange(2, SDRAM0_B2CR);
+	getmemrange(3, SDRAM0_B3CR);
+
+	return mem_bank;
 }
+