diff options
| author | Steven J. Magnani <steve@digidescorp.com> | 2005-09-21 13:53:44 +0000 |
|---|---|---|
| committer | Steven J. Magnani <steve@digidescorp.com> | 2005-09-21 13:53:44 +0000 |
| commit | ef79223156c52e39b7eef0b7df8adc24886828c7 (patch) | |
| tree | 6f669e006a4990638047e3d8a6f78bced9a2770c | |
| parent | b140d56f63a4e3d44a38ace759d2735f31f2bb68 (diff) | |
Bug fixes: read all 16 bits of DMA configuration; set up NMI/SERR handling in I/O space not PCI space. Comment out posted-memory-write code that looks to have been mis-inherited.
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2045 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
| -rw-r--r-- | src/southbridge/intel/i82801dbm/i82801dbm_lpc.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/src/southbridge/intel/i82801dbm/i82801dbm_lpc.c b/src/southbridge/intel/i82801dbm/i82801dbm_lpc.c index 3325a743c8..c2135c0183 100644 --- a/src/southbridge/intel/i82801dbm/i82801dbm_lpc.c +++ b/src/southbridge/intel/i82801dbm/i82801dbm_lpc.c @@ -8,9 +8,11 @@ #include <device/pci_ids.h> #include <device/pci_ops.h> #include <pc80/mc146818rtc.h> +#include <pc80/isa-dma.h> +#include <arch/io.h> #include "i82801dbm.h" -void isa_dma_init(void); /* from /pc80/isa-dma.c */ + #define NMI_OFF 0 @@ -52,7 +54,7 @@ void i82801dbm_lpc_route_dma( struct device *dev, uint8_t mask) { uint16_t word; int i; - word = pci_read_config8(dev, PCI_DMA_CFG); + word = pci_read_config16(dev, PCI_DMA_CFG); word &= ((1 << 10) - (1 << 8)); for(i = 0; i < 8; i++) { if (i == 4) @@ -123,10 +125,16 @@ static void lpc_init(struct device *dev) i82801dbm_enable_ioapic(dev); i82801dbm_enable_serial_irqs(dev); - + +#ifdef SUSPICIOUS_LOOKING_CODE + // The ICH-4 datasheet does not mention this configuration register. + // This code may have been inherited (incorrectly) from code for the AMD 766 southbridge, + // which *does* support this functionality. + /* posted memory write enable */ byte = pci_read_config8(dev, 0x46); pci_write_config8(dev, 0x46, byte | (1<<0)); +#endif /* power after power fail */ /* FIXME this doesn't work! */ @@ -145,16 +153,16 @@ static void lpc_init(struct device *dev) #endif /* Set up NMI on errors */ - byte = pci_read_config8(dev, 0x61); - byte |= (1 << 3); /* IOCHK# NMI Enable */ - byte |= (1 << 6); /* PCI SERR# Enable */ - pci_write_config8(dev, 0x61, byte); - byte = pci_read_config8(dev, 0x70); + byte = inb(0x61); + byte &= ~(1 << 3); /* IOCHK# NMI Enable */ + byte &= ~(1 << 2); /* PCI SERR# Enable */ + outb(byte, 0x61); + byte = inb(0x70); nmi_option = NMI_OFF; get_option(&nmi_option, "nmi"); if (nmi_option) { - byte |= (1 << 7); /* set NMI */ - pci_write_config8(dev, 0x70, byte); + byte &= ~(1 << 7); /* set NMI */ + outb(byte, 0x70); } /* Initialize the real time clock */ |