Eric, for your viewing pleasure, patches to arch/i386/kernel/process.c
#define CONFIG_LINUXBIOS_PM
#ifdef CONFIG_LINUXBIOS_PM
#include <linux/pci.h>
// reset for sis 503
void
sis503_reset(struct pci_dev *dev)
{
unsigned char b;
unsigned short acpi_base;
printk(KERN_ERR __FUNCTION__ ": starting reset operation. \n");
/* Enable ACPI by set B7 on Reg 0x40, LPC */
pci_read_config_byte(dev, 0x40, &b);
pci_write_config_byte(dev, 0x40, b | 0x80);
printk(KERN_ERR __FUNCTION__ ": enabled ACPI. \n");
/* get the ACPI base address for register 0x74,0x75 of LPC */
pci_read_config_word(dev, 0x74, &acpi_base);
printk(KERN_ERR __FUNCTION__ ":acpi base: %x\n", acpi_base);
/* Set software watchdog timer init value */
outb(0x03, 0x4a + acpi_base);
printk(KERN_ERR __FUNCTION__ ": set the dog. \n");
printk(KERN_ERR __FUNCTION__ ": enabling dog. \n");
/* Software watchdog enable, issue PCIRST# when time expire */
outb(0x8f, 0x4b + acpi_base);
printk(KERN_ERR __FUNCTION__ ": We should reset soon. \n");
}
// power off for sis 503
void
sis503_off(struct pci_dev *dev)
{
unsigned char b;
unsigned short acpi_base;
printk(KERN_ERR __FUNCTION__ ": starting reset operation. \n");
/* Enable ACPI by set B7 on Reg 0x40, LPC */
pci_read_config_byte(dev, 0x40, &b);
pci_write_config_byte(dev, 0x40, b | 0x80);
printk(KERN_ERR __FUNCTION__ ": enabled ACPI. \n");
/* get the ACPI base address for register 0x74,0x75 of LPC */
pci_read_config_word(dev, 0x74, &acpi_base);
printk (KERN_ERR __FUNCTION__ ":acpi base: %x\n", acpi_base);
/* ACPI Register 5, Bit 10-12, Sleeping Type,
set to 101 -> S5, soft_off */
outb(0x14, 0x05 + acpi_base);
printk(KERN_ERR __FUNCTION__ ": DONE setting sleep type. \n");
/* ACPI Register 5, Bit 13, Sleep Enable */
outb(0x20 | 0x14, 0x05 + acpi_base);
printk(KERN_ERR __FUNCTION__ ": DONE sleep enable. \n");
}
struct linuxbios_control {
u_short vendor, device;
void (*poweroff)(struct pci_dev *);
void (*reset)(struct pci_dev *);
};
struct linuxbios_control controls[] = {
{PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503, sis503_off, sis503_reset}
};
// for the machine we're on, find the reset/power off control stuff.
struct linuxbios_control *findcontrol(struct pci_dev **d)
{
struct linuxbios_control *lb = controls, *retval = 0;
int i;
printk(KERN_ERR __FUNCTION__ ": Find vendor 0x%x device 0x%x\n",
lb->vendor, lb->device);
for(lb = controls, i = 0;
(i < sizeof(controls)/sizeof(controls[0])) && (! retval);
i++, lb++)
{
*d = pci_find_device(lb->vendor, lb->device, 0);
if (*d)
retval = lb;
}
printk(KERN_ERR __FUNCTION__ ": result of find is %p\n", retval);
return retval;
}
// power off in the linuxbios world
void
linuxbios_poweroff(void)
{
struct linuxbios_control *lb = 0;
struct pci_dev *dev;
printk(KERN_ERR __FUNCTION__ ": find an lb\n");
lb = findcontrol(&dev);
printk(KERN_ERR __FUNCTION__ ": found lb %p, call %p\n",
lb, lb ? lb->poweroff : 0);
if (lb && (lb->poweroff))
lb->poweroff(dev);
printk(KERN_ERR __FUNCTION__ ": Returning? Can't happen, I
thought?\n");
}
// reset in the linuxbios world
void
linuxbios_reset(void)
{
struct linuxbios_control *lb = 0;
struct pci_dev *dev;
printk(KERN_ERR __FUNCTION__ ": find an lb\n");
lb = findcontrol(&dev);
printk(KERN_ERR __FUNCTION__ ": found lb %p, call %p\n",
lb, lb ? lb->reset : 0);
if (lb && (lb->reset))
lb->reset(dev);
printk(KERN_ERR __FUNCTION__ ": Returning? Can't happen, I
thought?\n");
}
#endif
// modified for the linuxbios power off stuff.
void machine_power_off(void)
{
printk("MACHINE_POWER_OFF\n");
#ifdef CONFIG_LINUXBIOS_PM
linuxbios_poweroff();
#endif
if (pm_power_off)
pm_power_off();
}
