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authorDamien Zammit <damien@zamaudio.com>2016-01-22 19:11:44 +1100
committerMartin Roth <martinroth@google.com>2016-01-29 00:22:48 +0100
commitd63115daa8830ee94b188bbed76eb460aa05eb8a (patch)
treed05b94cf49d83d5679a4e72d7a531354befcb90e
parentfe9876a7631c7982fccf38692dbed955e229f47b (diff)
nb/intel/x4x: Tidy up raminit and fix msbpos() function
- Fix bug with msbpos, it was not returning the correct result due to typo in logic, and unsigned value needed to be negative. - Add reclaim above 4GiB - Fix to ME related registers near the end of raminit Change-Id: I04acd0593a457437ee4a42e14b287b2b17a160af Signed-off-by: Damien Zammit <damien@zamaudio.com> Reviewed-on: https://review.coreboot.org/13127 Tested-by: build bot (Jenkins) Reviewed-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
-rw-r--r--src/northbridge/intel/x4x/raminit_ddr2.c55
1 files changed, 47 insertions, 8 deletions
diff --git a/src/northbridge/intel/x4x/raminit_ddr2.c b/src/northbridge/intel/x4x/raminit_ddr2.c
index d21924b870..3dd00fb2b6 100644
--- a/src/northbridge/intel/x4x/raminit_ddr2.c
+++ b/src/northbridge/intel/x4x/raminit_ddr2.c
@@ -45,14 +45,22 @@ static u32 ddr2mhz(u32 speed)
return mhz[speed];
}
-static u8 msbpos(u8 val) //Reverse
+/* Find MSB bitfield location using bit scan reverse instruction */
+static u8 msbpos(u32 val)
{
- u8 i;
- for (i = 7; i >= 0; i--) {
- if ((val & (1 << i)) == 0)
- break;
+ u32 pos;
+
+ if (val == 0) {
+ printk(BIOS_WARNING, "WARNING: Input to BSR is zero\n");
+ return 0;
}
- return i;
+
+ asm ("bsrl %1, %0"
+ :"=r"(pos)
+ :"r"(val)
+ );
+
+ return (u8)(pos & 0xff);
}
static void sdram_detect_smallest_params2(struct sysinfo *s)
@@ -1614,7 +1622,9 @@ static void dradrb_ddr2(struct sysinfo *s)
static void mmap_ddr2(struct sysinfo *s)
{
- u32 gfxsize, gttsize, tsegsize, mmiosize, tom, tolud, touud, gfxbase, gttbase, tsegbase;
+ bool reclaim;
+ u32 gfxsize, gttsize, tsegsize, mmiosize, tom, tolud, touud;
+ u32 gfxbase, gttbase, tsegbase, reclaimbase, reclaimlimit;
u16 ggc;
u16 ggc2uma[] = { 0, 0, 0, 0, 0, 32, 48, 64, 128, 256, 96, 160, 224, 352 };
u8 ggc2gtt[] = { 0, 1, 0, 2, 0, 0, 0, 0, 0, 2, 3, 4};
@@ -1626,13 +1636,34 @@ static void mmap_ddr2(struct sysinfo *s)
mmiosize = 0x400; // 1GB MMIO
tom = s->channel_capacity[0] + s->channel_capacity[1] - ME_UMA_SIZEMB;
tolud = MIN(0x1000 - mmiosize, tom);
+
+ reclaim = false;
+ if ((tom - tolud) > 0x40)
+ reclaim = true;
+
+ if (reclaim) {
+ tolud = tolud & ~0x3f;
+ tom = tom & ~0x3f;
+ reclaimbase = MAX(0x1000, tom);
+ reclaimlimit = reclaimbase + (MIN(0x1000, tom) - tolud) - 0x40;
+ }
+
touud = tom;
+ if (reclaim)
+ touud = reclaimlimit + 0x40;
+
gfxbase = tolud - gfxsize;
gttbase = gfxbase - gttsize;
tsegbase = gttbase - tsegsize;
pci_write_config16(PCI_DEV(0,0,0), 0xb0, tolud << 4);
pci_write_config16(PCI_DEV(0,0,0), 0xa0, tom >> 6);
+ if (reclaim) {
+ pci_write_config16(PCI_DEV(0,0,0), 0x98,
+ (u16)(reclaimbase >> 6));
+ pci_write_config16(PCI_DEV(0,0,0), 0x9a,
+ (u16)(reclaimlimit >> 6));
+ }
pci_write_config16(PCI_DEV(0,0,0), 0xa2, touud);
pci_write_config32(PCI_DEV(0,0,0), 0xa4, gfxbase << 20);
pci_write_config32(PCI_DEV(0,0,0), 0xa8, gttbase << 20);
@@ -1993,7 +2024,15 @@ void raminit_ddr2(struct sysinfo *s)
printk(BIOS_DEBUG, "Done power settings\n");
// ME related
- //MCHBAR32(0xa30) = MCHBAR32(0xa30) | (1 << 26);
+ if (RANK_IS_POPULATED(s->dimms, 0, 0)
+ || RANK_IS_POPULATED(s->dimms, 1, 0)) {
+ MCHBAR8(0xa2f) = MCHBAR8(0xa2f) | (1 << 0);
+ }
+ if (RANK_IS_POPULATED(s->dimms, 0, 1)
+ || RANK_IS_POPULATED(s->dimms, 1, 1)) {
+ MCHBAR8(0xa2f) = MCHBAR8(0xa2f) | (1 << 1);
+ }
+ MCHBAR32(0xa30) = MCHBAR32(0xa30) | (1 << 26);
printk(BIOS_DEBUG, "Done ddr2\n");
}