Spaces:
Runtime error
Runtime error
File size: 2,174 Bytes
8df6da4 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 |
#include "libcflat.h"
#include "x86/acpi.h"
#include "asm/io.h"
u32* find_resume_vector_addr(void)
{
struct facs_descriptor_rev1 *facs = find_acpi_table_addr(FACS_SIGNATURE);
if (!facs)
return 0;
printf("FACS is at %p\n", facs);
return &facs->firmware_waking_vector;
}
#define RTC_SECONDS_ALARM 1
#define RTC_MINUTES_ALARM 3
#define RTC_HOURS_ALARM 5
#define RTC_ALARM_DONT_CARE 0xC0
#define RTC_REG_A 10
#define RTC_REG_B 11
#define RTC_REG_C 12
#define REG_A_UIP 0x80
#define REG_B_AIE 0x20
static inline int rtc_in(u8 reg)
{
outb(reg, 0x70);
return inb(0x71);
}
static inline void rtc_out(u8 reg, u8 val)
{
outb(reg, 0x70);
outb(val, 0x71);
}
extern char resume_start, resume_end;
int main(int argc, char **argv)
{
struct fadt_descriptor_rev1 *fadt = find_acpi_table_addr(FACP_SIGNATURE);
volatile u32 *resume_vector_ptr = find_resume_vector_addr();
char *addr, *resume_vec = (void*)0x1000;
*resume_vector_ptr = (u32)(ulong)resume_vec;
printf("resume vector addr is %p\n", resume_vector_ptr);
for (addr = &resume_start; addr < &resume_end; addr++)
*resume_vec++ = *addr;
printf("copy resume code from %p\n", &resume_start);
printf("PM1a event registers at %x\n", fadt->pm1a_evt_blk);
outw(0x400, fadt->pm1a_evt_blk + 2);
/* Setup RTC alarm to wake up on the next second. */
while ((rtc_in(RTC_REG_A) & REG_A_UIP) == 0);
while ((rtc_in(RTC_REG_A) & REG_A_UIP) != 0);
rtc_in(RTC_REG_C);
rtc_out(RTC_SECONDS_ALARM, RTC_ALARM_DONT_CARE);
rtc_out(RTC_MINUTES_ALARM, RTC_ALARM_DONT_CARE);
rtc_out(RTC_HOURS_ALARM, RTC_ALARM_DONT_CARE);
rtc_out(RTC_REG_B, rtc_in(RTC_REG_B) | REG_B_AIE);
*(volatile int*)0 = 0;
asm volatile("outw %0, %1" :: "a"((short)0x2400), "d"((short)fadt->pm1a_cnt_blk):"memory");
while(1)
*(volatile int*)0 = 1;
return 0;
}
asm (
".global resume_start\n"
".global resume_end\n"
".code16\n"
"resume_start:\n"
"mov 0x0, %eax\n"
"mov $0xf4, %dx\n"
"out %eax, %dx\n"
"1: hlt\n"
"jmp 1b\n"
"resume_end:\n"
#ifdef __i386__
".code32\n"
#else
".code64\n"
#endif
);
|