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nb/intel/ironlake: Correct `set_4cf` 

We only need to toggle one bit at a time. Introduce `rmw_500` to
simplify the code. The rank population doesn't seem to matter.

Tested on out-of-tree HP 630, still boots.

Change-Id: Ic1a680dae90889c84c9b2c536745e254475ff878
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49577
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Angel Pons 2021-01-15 20:34:51 +01:00 committed by Patrick Georgi
parent b6d7a12d0f
commit c10f8b219e
1 changed files with 16 additions and 15 deletions
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31
src/northbridge/intel/ironlake/raminit.c
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@ -260,6 +260,12 @@ write_500(struct raminfo *info, int channel, u32 val, u16 addr, int bits,
;
}
static void rmw_500(struct raminfo *info, int channel, u16 addr, int bits, u32 and, u32 or)
{
const u32 val = read_500(info, channel, addr, bits) & and;
write_500(info, channel, val | or, addr, bits, 1);
}
static int rw_test(int rank)
{
const u32 mask = 0xf00fc33c;
@ -436,14 +442,13 @@ config_rank(struct raminfo *info, int s3resume, int channel, int slot, int rank)
MCHBAR8(0x5ff) = 0x80;
}
static void set_4cf(struct raminfo *info, int channel, u8 val)
static void set_4cf(struct raminfo *info, int channel, u8 bit, u8 val)
{
gav(read_500(info, channel, 0x4cf, 4)); // = 0xc2300cf9
write_500(info, channel, val, 0x4cf, 4, 1);
gav(read_500(info, channel, 0x659, 4)); // = 0x80300839
write_500(info, channel, val, 0x659, 4, 1);
gav(read_500(info, channel, 0x697, 4)); // = 0x80300839
write_500(info, channel, val, 0x697, 4, 1);
const u16 regtable[] = { 0x4cf, 0x659, 0x697 };
val &= 1;
for (int i = 0; i < ARRAY_SIZE(regtable); i++)
rmw_500(info, channel, regtable[i], 4, ~(1 << bit), val << bit);
}
static void set_334(int zero)
@ -4327,8 +4332,7 @@ void raminit(const int s3resume, const u8 *spd_addrmap)
write_1d0(7, 0x328, 6, 1);
for (channel = 0; channel < NUM_CHANNELS; channel++)
set_4cf(&info, channel,
info.populated_ranks[channel][0][0] ? 8 : 0);
set_4cf(&info, channel, 1, 0);
read_1d0(0x116, 4); // = 0x4040432 // !!!!
write_1d0(2, 0x116, 4, 1);
@ -4361,8 +4365,7 @@ void raminit(const int s3resume, const u8 *spd_addrmap)
}
for (channel = 0; channel < NUM_CHANNELS; channel++)
set_4cf(&info, channel,
info.populated_ranks[channel][0][0] ? 9 : 1);
set_4cf(&info, channel, 1, 1);
rmw_1d0(0x116, 0xe, 1, 4); // = 0x4040432 // !!!!
MCHBAR32(0x144); // !!!!
@ -4375,8 +4378,7 @@ void raminit(const int s3resume, const u8 *spd_addrmap)
write_1d0(4, 0x328, 6, 1);
for (channel = 0; channel < NUM_CHANNELS; channel++)
set_4cf(&info, channel,
info.populated_ranks[channel][0][0] ? 9 : 0);
set_4cf(&info, channel, 2, 0);
MCHBAR32(0x130) = 0x11111301 | (info.populated_ranks[1][0][0] << 30) |
(info.populated_ranks[0][0][0] << 29);
@ -4390,8 +4392,7 @@ void raminit(const int s3resume, const u8 *spd_addrmap)
write_1d0(0x35, 0x14b, 7, 1);
for (channel = 0; channel < NUM_CHANNELS; channel++)
set_4cf(&info, channel,
info.populated_ranks[channel][0][0] ? 0xb : 0x2);
set_4cf(&info, channel, 2, 1);
set_334(1);