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| author | Scott Duplichan <scott@notabs.org> | 2011-05-15 21:56:03 +0000 |
|---|---|---|
| committer | Marc Jones <marc.jones@amd.com> | 2011-05-15 21:56:03 +0000 |
| commit | b7e068305c4186608ae70a6af8a3862a43a68b8d (patch) | |
| tree | 177e1486539ee9dcc6ae4e169d25541a68f2f0bd | |
| parent | 2cc5f550c72ac6a13da798b8f073e3d5c55177e0 (diff) | |
| download | coreboot-b7e068305c4186608ae70a6af8a3862a43a68b8d.tar.xz | |
Enable SPI cacheline prefetch early to reduce boot time.
Signed-off-by: Scott Duplichan <scott@notabs.org>
Acked-by: Marc Jones <marcj303@gmail.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6585 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
| -rw-r--r-- | src/mainboard/amd/persimmon/romstage.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/src/mainboard/amd/persimmon/romstage.c b/src/mainboard/amd/persimmon/romstage.c index da2db64071..749c51b649 100644 --- a/src/mainboard/amd/persimmon/romstage.c +++ b/src/mainboard/amd/persimmon/romstage.c @@ -50,6 +50,21 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx) // all cores: set pstate 0 (1600 MHz) early to save a few ms of boot time __writemsr (0xc0010062, 0); + if (boot_cpu()) + { + u8 reg8; + // SB800: program AcpiMmioEn to enable MMIO access to MiscCntrl register + outb(0x24, 0xCD6); + reg8 = inb(0xCD7); + reg8 |= 1; + reg8 &= ~(1 << 1); + outb(reg8, 0xCD7); + + // program SB800 MiscCntrl + *(volatile u32 *)(0xFED80000+0xE00+0x40) &= ~((1 << 0) | (1 << 2)); /* 48Mhz */ + *(volatile u32 *)(0xFED80000+0xE00+0x40) |= 1 << 1; /* 48Mhz */ + } + // early enable of PrefetchEnSPIFromHost if (boot_cpu()) { @@ -78,17 +93,6 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx) f81865f_enable_serial(SERIAL_DEV, CONFIG_TTYS0_BASE); console_init(); } - //reg8 = pmio_read(0x24); - outb(0x24, 0xCD6); - reg8 = inb(0xCD7); - reg8 |= 1; - reg8 &= ~(1 << 1); - //pmio_write(0x24, reg8); - outb(0x24, 0xCD6); - outb(reg8, 0xCD7); - - *(volatile u32 *)(0xFED80000+0xE00+0x40) &= ~((1 << 0) | (1 << 2)); /* 48Mhz */ - *(volatile u32 *)(0xFED80000+0xE00+0x40) |= 1 << 1; /* 48Mhz */ /* Halt if there was a built in self test failure */ post_code(0x34); |