From ddddf15ca359e932ed2e61e9a6dcec77ed2d4411 Mon Sep 17 00:00:00 2001 From: Paul Menzel Date: Tue, 23 Apr 2013 14:40:23 +0200 Subject: Intel 82801Gx: LPC: Unify I/O APIC setup MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Remove local copies of reading and writing I/O APIC registers by using already available functions. This change is similar to commit db4f875a412e6c41f48a86a79b72465f6cd81635 Author: Kyösti Mälkki Date: Tue Jan 31 17:24:12 2012 +0200 IOAPIC: Divide setup_ioapic() in two parts. Reviewed-on: http://review.coreboot.org/300 and commit e614353194c712a40aa8444a530b2062876eabe3 Author: Kyösti Mälkki Date: Tue Feb 26 17:24:41 2013 +0200 Unify setting 82801a/b/c/d IOAPIC ID Reviewed-on: http://review.coreboot.org/2532 and uses `io_apic_read()` and `io_apic_write()` too. As commented by Aaron Durbin, a separate `i82801gx_enable_acpi()` is not needed: “The existing code path *in this file* is about enabling the io apic.” [1]. [1] http://review.coreboot.org/#/c/3182/4/src/southbridge/intel/lynxpoint/lpc.c Change-Id: I104a2d9c2898da14d26f8f2992d5a065ad640356 Signed-off-by: Paul Menzel Reviewed-on: http://review.coreboot.org/3181 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/southbridge/intel/i82801gx/lpc.c | 42 ++++++++++++------------------------ 1 file changed, 14 insertions(+), 28 deletions(-) (limited to 'src') diff --git a/src/southbridge/intel/i82801gx/lpc.c b/src/southbridge/intel/i82801gx/lpc.c index 777a6d772f..9285080f19 100644 --- a/src/southbridge/intel/i82801gx/lpc.c +++ b/src/southbridge/intel/i82801gx/lpc.c @@ -39,37 +39,23 @@ typedef struct southbridge_intel_i82801gx_config config_t; -static void i82801gx_enable_apic(struct device *dev) +/** + * Set miscellanous static southbridge features. + * + * @param dev PCI device with I/O APIC control registers + */ +static void i82801gx_enable_ioapic(struct device *dev) { - int i; - u32 reg32; - volatile u32 *ioapic_index = (volatile u32 *)(IO_APIC_ADDR); - volatile u32 *ioapic_data = (volatile u32 *)(IO_APIC_ADDR + 0x10); - - /* Enable ACPI I/O and power management. - * Set SCI IRQ to IRQ9 - */ + /* Enable ACPI I/O range decode */ pci_write_config8(dev, ACPI_CNTL, ACPI_EN); - *ioapic_index = 0; - *ioapic_data = (2 << 24); - - *ioapic_index = 0; - reg32 = *ioapic_data; - printk(BIOS_DEBUG, "Southbridge APIC ID = %x\n", (reg32 >> 24) & 0x0f); - if (reg32 != (2 << 24)) - die("APIC Error\n"); - - printk(BIOS_SPEW, "Dumping IOAPIC registers\n"); - for (i=0; i<3; i++) { - *ioapic_index = i; - printk(BIOS_SPEW, " reg 0x%04x:", i); - reg32 = *ioapic_data; - printk(BIOS_SPEW, " 0x%08x\n", reg32); - } + set_ioapic_id(IO_APIC_ADDR, 0x02); - *ioapic_index = 3; /* Select Boot Configuration register. */ - *ioapic_data = 1; /* Use Processor System Bus to deliver interrupts. */ + /* + * Select Boot Configuration register (0x03) and + * use Processor System Bus (0x01) to deliver interrupts. + */ + io_apic_write(IO_APIC_ADDR, 0x03, 0x01); } static void i82801gx_enable_serial_irqs(struct device *dev) @@ -422,7 +408,7 @@ static void lpc_init(struct device *dev) pci_write_config16(dev, PCI_COMMAND, 0x000f); /* IO APIC initialization. */ - i82801gx_enable_apic(dev); + i82801gx_enable_ioapic(dev); i82801gx_enable_serial_irqs(dev); -- cgit v1.2.3