[coreboot-gerrit] New patch to review for coreboot: 1de6dcc Intel Lynx Point: LPC: Unify I/O APIC setup

[Paul Menzel]

Paul Menzel ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3182

-gerrit

commit 1de6dcc51e9a274c34605ef07171fe1ea120b89e
Author: Paul Menzel 
Date:   Fri May 3 12:17:02 2013 +0200

Intel Lynx Point: LPC: Unify I/O APIC setup

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.

Change-Id: I6f2559f1d134590f781bd2cb325a9560512285dc
    Signed-off-by: Paul Menzel 
---
 src/southbridge/intel/lynxpoint/lpc.c | 65 ++++++++++++++++++-----------------
 1 file changed, 34 insertions(+), 31 deletions(-)

diff --git a/src/southbridge/intel/lynxpoint/lpc.c b/src/southbridge/intel/lynxpoint/lpc.c
index 40e0468..72347dc 100644
--- a/src/southbridge/intel/lynxpoint/lpc.c
+++ b/src/southbridge/intel/lynxpoint/lpc.c
@@ -43,43 +43,43 @@

typedef struct southbridge_intel_lynxpoint_config config_t;

-static void pch_enable_apic(struct device *dev)
+/**
+ * Enable ACPI I/O range.
+ *
+ * @param dev PCI device with ACPI and PM BAR's
+ */
+static void i82801gx_enable_acpi(struct device *dev)
+{
+	/* Set ACPI base address (I/O space). */
+	/* pci_write_config32(dev, PMBASE, (PMBASE_ADDR | 1)); // not needed? */
+
+	/* Enable ACPI I/O range decode and ACPI power management. */
+	pci_write_config8(dev, ACPI_CNTL, ACPI_EN);
+}
+
+/**
+ * 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
-	 */
-	pci_write_config8(dev, ACPI_CNTL, 0x80);

-	*ioapic_index = 0;
-	*ioapic_data = (2 << 24);
+	set_ioapic_id(IO_APIC_ADDR, 0x02);

/* affirm full set of redirection table entries ("write once") */
-	*ioapic_index = 1;
-	reg32 = *ioapic_data;
-	*ioapic_index = 1;
-	*ioapic_data = reg32;
-
-	*ioapic_index = 0;
-	reg32 = *ioapic_data;
-	printk(BIOS_DEBUG, "Southbridge APIC ID = %x\n", (reg32 >> 24) & 0x0f);
-	if (reg32 != (1 << 25))
-		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);
-	}
+	reg32 = io_apic_read(IO_APIC_ADDR, 0x01);
+	io_apic_write(IO_APIC_ADDR, reg32);
+
+	printk(BIOS_SPEW, "IOAPIC: Dumping registers\n");
+	for (i = 0; i < 3; i++)
+		printk(BIOS_SPEW, "  reg 0x%04x: 0x%08x\n", i,
+		       io_apic_read(ioapic_base, i));

-	*ioapic_index = 3; /* Select Boot Configuration register. */
-	*ioapic_data = 1; /* Use Processor System Bus to deliver interrupts. */
+	io_apic_write(IO_APIC_ADDR, 0x03, /* Select Boot Configuration register. */
+		      0x01); /* Use Processor System Bus to deliver interrupts. */
 }

static void pch_enable_serial_irqs(struct device *dev)
@@ -546,8 +546,11 @@ static void lpc_init(struct device *dev)
    /* Set the value for PCI command register. */
    pci_write_config16(dev, PCI_COMMAND, 0x000f);

+	/* ACPI initialization. */
+	pch_enable_acpi(dev);
+
    /* IO APIC initialization. */
-	pch_enable_apic(dev);
+	pch_enable_ioapic(dev);

pch_enable_serial_irqs(dev);