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arch/x86/ioapic: Split some ioapic utility functions 

Change-Id: I70dfec900e8ce6630e61bc3fcbcfd88c097a5600
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55183
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Kyösti Mälkki 2021-06-03 23:12:09 +03:00
parent aa49608a2b
commit ea2fb8d80c
1 changed files with 40 additions and 37 deletions
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77
src/arch/x86/ioapic.c
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@ -1,5 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#include <assert.h>
#include <device/mmio.h>
#include <arch/ioapic.h>
#include <console/console.h>
@ -21,7 +22,7 @@ static int ioapic_interrupt_count(void *ioapic_base)
{
/* Read the available number of interrupts. */
int ioapic_interrupts = (io_apic_read(ioapic_base, 0x01) >> 16) & 0xff;
if (ioapic_interrupts == 0xff)
if (!ioapic_interrupts || ioapic_interrupts == 0xff)
ioapic_interrupts = 23;
ioapic_interrupts += 1; /* Bits 23-16 specify the maximum redirection
entry, which is the number of interrupts
@ -31,23 +32,21 @@ static int ioapic_interrupt_count(void *ioapic_base)
return ioapic_interrupts;
}
void clear_ioapic(void *ioapic_base)
static void clear_vectors(void *ioapic_base, u8 first, u8 last)
{
u32 low, high;
u32 i, ioapic_interrupts;
u8 i;
printk(BIOS_DEBUG, "IOAPIC: Clearing IOAPIC at %p\n", ioapic_base);
ioapic_interrupts = ioapic_interrupt_count(ioapic_base);
low = INT_DISABLED;
high = NONE;
for (i = 0; i < ioapic_interrupts; i++) {
for (i = first; i <= last; i++) {
io_apic_write(ioapic_base, i * 2 + 0x10, low);
io_apic_write(ioapic_base, i * 2 + 0x11, high);
printk(BIOS_SPEW, "IOAPIC: reg 0x%08x value 0x%08x 0x%08x\n",
printk(BIOS_SPEW, "IOAPIC: vector 0x%02x value 0x%08x 0x%08x\n",
i, high, low);
}
@ -57,15 +56,42 @@ void clear_ioapic(void *ioapic_base)
}
}
void set_ioapic_id(void *ioapic_base, u8 ioapic_id)
void clear_ioapic(void *ioapic_base)
{
clear_vectors(ioapic_base, 0, ioapic_interrupt_count(ioapic_base) - 1);
}
static void route_i8259_irq0(void *ioapic_base)
{
u32 bsp_lapicid = lapicid();
u32 low, high;
ASSERT(bsp_lapicid < 255);
printk(BIOS_DEBUG, "IOAPIC: Bootstrap Processor Local APIC = 0x%02x\n",
bsp_lapicid);
/* Enable Virtual Wire Mode. Should this be LOGICAL_DEST instead? */
low = INT_ENABLED | TRIGGER_EDGE | POLARITY_HIGH | PHYSICAL_DEST | ExtINT;
high = bsp_lapicid << (56 - 32);
io_apic_write(ioapic_base, 0x10, low);
io_apic_write(ioapic_base, 0x11, high);
if (io_apic_read(ioapic_base, 0x10) == 0xffffffff) {
printk(BIOS_WARNING, "IOAPIC not responding.\n");
return;
}
printk(BIOS_SPEW, "IOAPIC: reg 0x%08x value 0x%08x 0x%08x\n", 0, high, low);
}
void set_ioapic_id(void *ioapic_base, u8 ioapic_id)
{
int i;
printk(BIOS_DEBUG, "IOAPIC: Initializing IOAPIC at %p\n",
ioapic_base);
printk(BIOS_DEBUG, "IOAPIC: Bootstrap Processor Local APIC = 0x%02x\n",
bsp_lapicid);
if (ioapic_id) {
printk(BIOS_DEBUG, "IOAPIC: ID = 0x%02x\n", ioapic_id);
@ -84,11 +110,7 @@ void set_ioapic_id(void *ioapic_base, u8 ioapic_id)
static void load_vectors(void *ioapic_base)
{
u32 bsp_lapicid = lapicid();
u32 low, high;
u32 i, ioapic_interrupts;
ioapic_interrupts = ioapic_interrupt_count(ioapic_base);
int first = 1, last;
if (CONFIG(IOAPIC_INTERRUPTS_ON_FSB)) {
/*
@ -104,29 +126,10 @@ static void load_vectors(void *ioapic_base)
io_apic_write(ioapic_base, 0x03, 0);
}
/* Enable Virtual Wire Mode. */
low = INT_ENABLED | TRIGGER_EDGE | POLARITY_HIGH | PHYSICAL_DEST | ExtINT;
high = bsp_lapicid << (56 - 32);
route_i8259_irq0(ioapic_base);
io_apic_write(ioapic_base, 0x10, low);
io_apic_write(ioapic_base, 0x11, high);
if (io_apic_read(ioapic_base, 0x10) == 0xffffffff) {
printk(BIOS_WARNING, "IOAPIC not responding.\n");
return;
}
printk(BIOS_SPEW, "IOAPIC: reg 0x%08x value 0x%08x 0x%08x\n",
0, high, low);
low = INT_DISABLED;
high = NONE;
for (i = 1; i < ioapic_interrupts; i++) {
io_apic_write(ioapic_base, i * 2 + 0x10, low);
io_apic_write(ioapic_base, i * 2 + 0x11, high);
printk(BIOS_SPEW, "IOAPIC: reg 0x%08x value 0x%08x 0x%08x\n",
i, high, low);
}
last = ioapic_interrupt_count(ioapic_base) - 1;
clear_vectors(ioapic_base, first, last);
}
void setup_ioapic(void *ioapic_base, u8 ioapic_id)