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Rewrote timer code.

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The new code is based on timestamps, rather than delays. This eliminates the
need to update every timer in timer_process(), which cost a non-trivial amount
of CPU time on low-end machines.

This involved changes to every user of the timer code, so this change almost
certainly introduces bugs.
This commit is contained in:
SarahW 2018-08-02 22:06:10 +01:00
commit a7d006b637
79 changed files with 1050 additions and 1033 deletions
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14
src/intel.c
View file

@ -45,11 +45,10 @@ void batman_brdconfig_write(uint16_t port, uint8_t val, void *p)
}
static uint16_t batman_timer_latch;
static int batman_timer = 0;
static pc_timer_t batman_timer;
static void batman_timer_over(void *p)
{
batman_timer = 0;
}
static void batman_timer_write(uint16_t addr, uint8_t val, void *p)
@ -58,7 +57,7 @@ static void batman_timer_write(uint16_t addr, uint8_t val, void *p)
batman_timer_latch = (batman_timer_latch & 0xff) | (val << 8);
else
batman_timer_latch = (batman_timer_latch & 0xff00) | val;
batman_timer = batman_timer_latch * TIMER_USEC;
timer_set_delay_u64(&batman_timer, batman_timer_latch * TIMER_USEC);
}
static uint8_t batman_timer_read(uint16_t addr, void *p)
@ -67,12 +66,7 @@ static uint8_t batman_timer_read(uint16_t addr, void *p)
cycles -= (int)PITCONST;
timer_clock();
if (batman_timer < 0)
return 0;
batman_timer_latch = batman_timer / TIMER_USEC;
batman_timer_latch = timer_get_remaining_us(&batman_timer);
if (addr & 1)
return batman_timer_latch >> 8;
@ -87,7 +81,7 @@ void intel_batman_init()
io_sethandler(0x0078, 0x0002, batman_timer_read, NULL, NULL, batman_timer_write, NULL, NULL, NULL);
io_sethandler(0x0092, 0x0001, batman_brdconfig, NULL, NULL, batman_brdconfig_write, NULL, NULL, NULL);
batman_port_92 = 0;
timer_add(batman_timer_over, &batman_timer, &batman_timer, NULL);
timer_add(&batman_timer, batman_timer_over, NULL, 0);
}