nb/intel/i945: Enable and allocate 8M for TSEG
TSEG can be used as a stage cache and SMM can be relocated here.
Tested on Intel D945GCLF, still boots.
Change-Id: I0da5a00c98c4c4fb309b2691dc1d4645eb35b4fd
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/25592
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/northbridge/intel/i945/early_init.c b/src/northbridge/intel/i945/early_init.c
index bf486a0..7de2c73 100644
--- a/src/northbridge/intel/i945/early_init.c
+++ b/src/northbridge/intel/i945/early_init.c
@@ -192,6 +192,11 @@
gfxsize = 2;
pci_write_config16(PCI_DEV(0, 0x00, 0), GGC, ((gfxsize + 1) << 4));
+ reg8 = pci_read_config8(PCI_DEV(0, 0, 0), ESMRAMC);
+ reg8 &= ~0x7;
+ reg8 |= (2 << 1) | (1 << 0); /* 8M and TSEG_Enable */
+ pci_write_config8(PCI_DEV(0, 0, 0), ESMRAMC, reg8);
+
/* Set C0000-FFFFF to access RAM on both reads and writes */
pci_write_config8(PCI_DEV(0, 0x00, 0), PAM0, 0x30);
pci_write_config8(PCI_DEV(0, 0x00, 0), PAM1, 0x33);