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| author | Timothy Pearson <tpearson@raptorengineeringinc.com> | 2015-09-05 17:46:15 -0500 |
|---|---|---|
| committer | Peter Stuge <peter@stuge.se> | 2015-10-24 07:17:21 +0200 |
| commit | 70f2736b8eae5aa9e83418c0318da45ca031bb55 (patch) | |
| tree | c5487c5b6fe6a9c4bfd34e2151e22fcf2d8f0e90 | |
| parent | b27dfe9998268b56a45a736d7e351b06d4d32a19 (diff) | |
| download | coreboot-70f2736b8eae5aa9e83418c0318da45ca031bb55.tar.xz | |
southbridge/amd/sb700: Fix boot hang on ASUS KGPE-D16
Change-Id: I1d7d6715663a13ab94fd6d71808e35f0f7384d00
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/11938
Tested-by: build bot (Jenkins)
Reviewed-by: Peter Stuge <peter@stuge.se>
| -rw-r--r-- | src/southbridge/amd/sb700/Kconfig | 4 | ||||
| -rw-r--r-- | src/southbridge/amd/sb700/early_setup.c | 8 |
2 files changed, 12 insertions, 0 deletions
diff --git a/src/southbridge/amd/sb700/Kconfig b/src/southbridge/amd/sb700/Kconfig index 076193447b..bca74fb083 100644 --- a/src/southbridge/amd/sb700/Kconfig +++ b/src/southbridge/amd/sb700/Kconfig @@ -42,6 +42,10 @@ config SOUTHBRIDGE_AMD_SB700_SKIP_ISA_DMA_INIT bool default n +config SOUTHBRIDGE_AMD_SB700_DISABLE_ISA_DMA + bool + default n + config EHCI_BAR hex default 0xfef00000 diff --git a/src/southbridge/amd/sb700/early_setup.c b/src/southbridge/amd/sb700/early_setup.c index d25599ea2e..2828bbed51 100644 --- a/src/southbridge/amd/sb700/early_setup.c +++ b/src/southbridge/amd/sb700/early_setup.c @@ -439,6 +439,14 @@ static void sb700_devices_por_init(void) /*pci_write_config8(dev, 0x79, 0x4F); */ pci_write_config8(dev, 0x78, 0xFF); + if (IS_ENABLED(CONFIG_SOUTHBRIDGE_AMD_SB700_DISABLE_ISA_DMA)) { + printk(BIOS_DEBUG, "%s: Disabling ISA DMA support\n", __func__); + /* Disable LPC ISA DMA Capability */ + byte = pci_read_config8(dev, 0x78); + byte &= ~(1 << 0); + pci_write_config8(dev, 0x78, byte); + } + /* Set smbus iospace enable, I don't know why write 0x04 into reg5 that is reserved */ pci_write_config16(dev, 0x4, 0x0407); |