[coreboot-gerrit] Change in coreboot[master]: [UNTESTED] nb/intel/x4x/raminit: Move dummy reads after JEDEC init
Arthur Heymans (Code Review)
gerrit at coreboot.org
Sun Aug 13 09:54:25 CEST 2017
Arthur Heymans has uploaded this change for review. ( https://review.coreboot.org/20979
Change subject: [UNTESTED] nb/intel/x4x/raminit: Move dummy reads after JEDEC init
......................................................................
[UNTESTED] nb/intel/x4x/raminit: Move dummy reads after JEDEC init
Vendor only does dummy reads and right after JEDEC init is finished
and dram init was marked as finished.
Change-Id: I8069f9c08ad5e5268ddbe3711d58bc42522f938c
Signed-off-by: Arthur Heymans <arthur at aheymans.xyz>
---
M src/northbridge/intel/x4x/raminit_ddr2.c
1 file changed, 13 insertions(+), 22 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/79/20979/1
diff --git a/src/northbridge/intel/x4x/raminit_ddr2.c b/src/northbridge/intel/x4x/raminit_ddr2.c
index bc012d2..8ec2c79 100644
--- a/src/northbridge/intel/x4x/raminit_ddr2.c
+++ b/src/northbridge/intel/x4x/raminit_ddr2.c
@@ -2008,6 +2008,19 @@
MCHBAR32(0x400*ch + 0x268) = (MCHBAR32(0x400*ch + 0x268) & ~0xc0000000) | 0xc0000000;
}
+ // Dummy reads
+ if (s->boot_path == BOOT_PATH_NORMAL) {
+ volatile u32 data;
+ FOR_EACH_POPULATED_RANK(s->dimms, ch, r) {
+ for (bank = 0; bank < 4; bank++) {
+ data = read32((u32 *)((ch << 29)
+ | (r * 0x08000000) | (0x800000)
+ | (bank << 12)));
+ }
+ }
+ }
+ printk(BIOS_DEBUG, "Done dummy reads\n");
+
// Receive enable
sdram_program_receive_enable(s);
printk(BIOS_DEBUG, "Done rcven\n");
@@ -2022,28 +2035,6 @@
MCHBAR8(0x5dc) = MCHBAR8(0x5dc) | 0x80;
MCHBAR8(0x5dc) = MCHBAR8(0x5dc) & ~0x80;
MCHBAR8(0x5dc) = MCHBAR8(0x5dc) | 0x80;
-
- // Dummy writes / reads
- if (s->boot_path == BOOT_PATH_NORMAL) {
- volatile u32 data;
- FOR_EACH_POPULATED_RANK(s->dimms, ch, r) {
- for (bank = 0; bank < 4; bank++) {
- reg32 = (ch << 29) | (r*0x8000000) |
- (bank << 12);
- write32((u32 *)reg32, 0xffffffff);
- data = read32((u32 *)reg32);
- printk(BIOS_DEBUG, "Wrote ones,");
- printk(BIOS_DEBUG, " Read: [0x%08x]=0x%08x\n",
- reg32, data);
- write32((u32 *)reg32, 0x00000000);
- data = read32((u32 *)reg32);
- printk(BIOS_DEBUG, "Wrote zeros,");
- printk(BIOS_DEBUG, " Read: [0x%08x]=0x%08x\n",
- reg32, data);
- }
- }
- }
- printk(BIOS_DEBUG, "Done dummy reads\n");
// XXX tRD
--
To view, visit https://review.coreboot.org/20979
To unsubscribe, visit https://review.coreboot.org/settings
Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I8069f9c08ad5e5268ddbe3711d58bc42522f938c
Gerrit-Change-Number: 20979
Gerrit-PatchSet: 1
Gerrit-Owner: Arthur Heymans <arthur at aheymans.xyz>
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