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Diffstat (limited to 'arch/mips/txx9/generic/mem_tx4927.c')
-rw-r--r--arch/mips/txx9/generic/mem_tx4927.c94
1 files changed, 15 insertions, 79 deletions
diff --git a/arch/mips/txx9/generic/mem_tx4927.c b/arch/mips/txx9/generic/mem_tx4927.c
index 12dfc377bf2f..ef6ea6e97873 100644
--- a/arch/mips/txx9/generic/mem_tx4927.c
+++ b/arch/mips/txx9/generic/mem_tx4927.c
@@ -1,5 +1,5 @@
/*
- * linux/arch/mips/tx4927/common/tx4927_prom.c
+ * linux/arch/mips/txx9/generic/mem_tx4927.c
*
* common tx4927 memory interface
*
@@ -32,8 +32,9 @@
#include <linux/init.h>
#include <linux/types.h>
#include <linux/io.h>
+#include <asm/txx9/tx4927.h>
-static unsigned int __init tx4927_process_sdccr(unsigned long addr)
+static unsigned int __init tx4927_process_sdccr(u64 __iomem *addr)
{
u64 val;
unsigned int sdccr_ce;
@@ -45,97 +46,32 @@ static unsigned int __init tx4927_process_sdccr(unsigned long addr)
unsigned int rs = 0;
unsigned int cs = 0;
unsigned int mw = 0;
- unsigned int msize = 0;
- val = __raw_readq((void __iomem *)addr);
+ val = __raw_readq(addr);
/* MVMCP -- need #defs for these bits masks */
sdccr_ce = ((val & (1 << 10)) >> 10);
sdccr_bs = ((val & (1 << 8)) >> 8);
sdccr_rs = ((val & (3 << 5)) >> 5);
- sdccr_cs = ((val & (3 << 2)) >> 2);
+ sdccr_cs = ((val & (7 << 2)) >> 2);
sdccr_mw = ((val & (1 << 0)) >> 0);
if (sdccr_ce) {
- switch (sdccr_bs) {
- case 0:{
- bs = 2;
- break;
- }
- case 1:{
- bs = 4;
- break;
- }
- }
- switch (sdccr_rs) {
- case 0:{
- rs = 2048;
- break;
- }
- case 1:{
- rs = 4096;
- break;
- }
- case 2:{
- rs = 8192;
- break;
- }
- case 3:{
- rs = 0;
- break;
- }
- }
- switch (sdccr_cs) {
- case 0:{
- cs = 256;
- break;
- }
- case 1:{
- cs = 512;
- break;
- }
- case 2:{
- cs = 1024;
- break;
- }
- case 3:{
- cs = 2048;
- break;
- }
- }
- switch (sdccr_mw) {
- case 0:{
- mw = 8;
- break;
- } /* 8 bytes = 64 bits */
- case 1:{
- mw = 4;
- break;
- } /* 4 bytes = 32 bits */
- }
+ bs = 2 << sdccr_bs;
+ rs = 2048 << sdccr_rs;
+ cs = 256 << sdccr_cs;
+ mw = 8 >> sdccr_mw;
}
- /* bytes per chip MB per chip num chips */
- msize = (((rs * cs * mw) / (1024 * 1024)) * bs);
-
- return (msize);
+ return rs * cs * mw * bs;
}
-
unsigned int __init tx4927_get_mem_size(void)
{
- unsigned int c0;
- unsigned int c1;
- unsigned int c2;
- unsigned int c3;
- unsigned int total;
-
- /* MVMCP -- need #defs for these registers */
- c0 = tx4927_process_sdccr(0xff1f8000);
- c1 = tx4927_process_sdccr(0xff1f8008);
- c2 = tx4927_process_sdccr(0xff1f8010);
- c3 = tx4927_process_sdccr(0xff1f8018);
- total = c0 + c1 + c2 + c3;
+ unsigned int total = 0;
+ int i;
- return (total);
+ for (i = 0; i < ARRAY_SIZE(tx4927_sdramcptr->cr); i++)
+ total += tx4927_process_sdccr(&tx4927_sdramcptr->cr[i]);
+ return total;
}