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/*
* SMI handler for Hudson southbridges
*
* Copyright (C) 2014 Alexandru Gagniuc <mr.nuke.me@gmail.com>
* Subject to the GNU GPL v2, or (at your option) any later version.
*/
#include "smi.h"
#include <console/console.h>
#include <cpu/x86/smm.h>
#include <delay.h>
enum smi_source {
SMI_SOURCE_SCI = (1 << 0),
SMI_SOURCE_GPE = (1 << 1),
SMI_SOURCE_0x84 = (1 << 2),
SMI_SOURCE_0x88 = (1 << 3),
SMI_SOURCE_IRQ_TRAP = (1 << 4),
SMI_SOURCE_0x90 = (1 << 5)
};
int southbridge_io_trap_handler(int smif)
{
return 0;
}
static void process_smi_sci(void)
{
const uint32_t status = smi_read32(0x10);
/* Clear events to prevent re-entering SMI if event isn't handled */
smi_write32(0x10, status);
}
static void process_gpe_smi(void)
{
const uint32_t status = smi_read32(0x80);
/* Clear events to prevent re-entering SMI if event isn't handled */
smi_write32(0x80, status);
}
static void process_smi_0x84(void)
{
const uint32_t status = smi_read32(0x84);
/* Clear events to prevent re-entering SMI if event isn't handled */
smi_write32(0x84, status);
}
static void process_smi_0x88(void)
{
const uint32_t status = smi_read32(0x88);
/* Clear events to prevent re-entering SMI if event isn't handled */
smi_write32(0x88, status);
}
static void process_smi_0x8c(void)
{
const uint32_t status = smi_read32(0x8c);
/* Clear events to prevent re-entering SMI if event isn't handled */
smi_write32(0x8c, status);
}
static void process_smi_0x90(void)
{
const uint32_t status = smi_read32(0x90);
/* Clear events to prevent re-entering SMI if event isn't handled */
smi_write32(0x90, status);
}
void southbridge_smi_handler(unsigned int node, smm_state_save_area_t *state_save)
{
const uint16_t smi_src = smi_read16(0x94);
if (smi_src & SMI_SOURCE_SCI)
process_smi_sci();
if (smi_src & SMI_SOURCE_GPE)
process_gpe_smi();
if (smi_src & SMI_SOURCE_0x84)
process_smi_0x84();
if (smi_src & SMI_SOURCE_0x88)
process_smi_0x88();
if (smi_src & SMI_SOURCE_IRQ_TRAP)
process_smi_0x8c();
if (smi_src & SMI_SOURCE_0x90)
process_smi_0x90();
}
void southbridge_smi_set_eos(void)
{
uint32_t reg = smi_read32(SMI_REG_SMITRIG0);
reg |= SMITRG0_EOS;
smi_write32(SMI_REG_SMITRIG0, reg);
}
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