From 9fd183efde9b78ba2f2bf1c1922a3968650b3b05 Mon Sep 17 00:00:00 2001 From: zbao Date: Wed, 1 Aug 2012 18:23:49 +0800 Subject: AMD F15tn northbridge: Remove the misleading 0x100 from the limitk. I dont known if missed something, but why an extra 0x100 was added to limit? My board would get the wrong memory table entry 7f000000-7fffffff as RAM, which is higher than TOM. coreboot memory table: 0. 0000000000000000-0000000000000fff: CONFIGURATION TABLES 1. 0000000000001000-000000000009ffff: RAM 2. 00000000000c0000-000000005e13efff: RAM 3. 000000005e13f000-000000005effffff: CONFIGURATION TABLES 4. 000000005f000000-000000007effffff: RESERVED 5. 000000007f000000-000000007fffffff: RAM 6. 00000000a0000000-00000000afffffff: RESERVED Ronald G. Minnich: I think someone who wrote the code was trying to round up the next 0x100 boundary and did it incorrectly. Here is code that would do it correctly: limitk = ((resource_t)((d.mask + 0x00000ff) & 0x1fffff00)) << 9 ; Zheng: Plus 0xFF is correct, but the d.mask take bit 0 as enable it. This bit should be clear when we try to calculate the limitk. Change-Id: I3848ed5f23001e5bd61a19833650fe13df26eef3 Signed-off-by: Zheng Bao Signed-off-by: zbao Reviewed-on: http://review.coreboot.org/1265 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich --- src/northbridge/amd/agesa/family15tn/northbridge.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src') diff --git a/src/northbridge/amd/agesa/family15tn/northbridge.c b/src/northbridge/amd/agesa/family15tn/northbridge.c index bc3877fb02..fc4115e687 100644 --- a/src/northbridge/amd/agesa/family15tn/northbridge.c +++ b/src/northbridge/amd/agesa/family15tn/northbridge.c @@ -790,7 +790,7 @@ static void domain_set_resources(device_t dev) if (!(d.mask & 1)) continue; basek = ((resource_t)(d.base & 0x1fffff00)) << 9; // could overflow, we may lost 6 bit here - limitk = ((resource_t)((d.mask + 0x00000100) & 0x1fffff00)) << 9 ; + limitk = ((resource_t)(((d.mask & ~1) + 0x000FF) & 0x1fffff00)) << 9 ; sizek = limitk - basek; -- cgit v1.2.3