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Diffstat (limited to 'src/southbridge/intel/i82801cx/lpc.c')
-rw-r--r--src/southbridge/intel/i82801cx/lpc.c44
1 files changed, 17 insertions, 27 deletions
diff --git a/src/southbridge/intel/i82801cx/lpc.c b/src/southbridge/intel/i82801cx/lpc.c
index a1ffb8f540..79998bc722 100644
--- a/src/southbridge/intel/i82801cx/lpc.c
+++ b/src/southbridge/intel/i82801cx/lpc.c
@@ -24,34 +24,24 @@
#define MAINBOARD_POWER_ON 1
-static void i82801cx_enable_ioapic( struct device *dev)
+/**
+ * Set miscellanous static southbridge features.
+ *
+ * @param dev PCI device with I/O APIC control registers
+ */
+static void i82801cx_enable_ioapic(struct device *dev)
{
- uint32_t dword;
- volatile uint32_t* ioapic_index = (volatile uint32_t*)IO_APIC_ADDR;
- volatile uint32_t* ioapic_data = (volatile uint32_t*)(IO_APIC_ADDR + 0x10);
-
- dword = pci_read_config32(dev, GEN_CNTL);
- dword |= (3 << 7); /* enable ioapic & disable SMBus interrupts */
- dword |= (1 <<13); /* coprocessor error enable */
- dword |= (1 << 1); /* delay transaction enable */
- dword |= (1 << 2); /* DMA collection buf enable */
- pci_write_config32(dev, GEN_CNTL, dword);
- printk(BIOS_DEBUG, "ioapic southbridge enabled %x\n",dword);
-
- // Must program the APIC's ID before using it
-
- *ioapic_index = 0; // Select APIC ID register
- *ioapic_data = (2<<24);
-
- // Hang if the ID didn't take (chip not present?)
- *ioapic_index = 0;
- dword = *ioapic_data;
- printk(BIOS_DEBUG, "Southbridge apic id = %x\n", (dword>>24) & 0xF);
- if(dword != (2<<24))
- die("");
-
- *ioapic_index = 3; // Select Boot Configuration register
- *ioapic_data = 1; // Use Processor System Bus to deliver interrupts
+ u32 reg32;
+
+ reg32 = pci_read_config32(dev, GEN_CNTL);
+ reg32 |= (1 << 13); /* Coprocessor error enable (COPR_ERR_EN) */
+ reg32 |= (3 << 7); /* IOAPIC enable (APIC_EN) */
+ reg32 |= (1 << 2); /* DMA collection buffer enable (DCB_EN) */
+ reg32 |= (1 << 1); /* Delayed transaction enable (DTE) */
+ pci_write_config32(dev, GEN_CNTL, reg32);
+ printk(BIOS_DEBUG, "IOAPIC Southbridge enabled %x\n", reg32);
+
+ set_ioapic_id(IO_APIC_ADDR, 0x02);
}
// This is how interrupts are received from the Super I/O chip