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aarch64 baremetal svc factored out for C and asm

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Ciro Santilli 六四事件 法轮功
2019-02-18 00:00:00 +00:00
parent a8b6f758ba
commit e855a262fd
17 changed files with 355 additions and 334 deletions
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39
baremetal/arch/aarch64/timer.c
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@@ -1,31 +1,14 @@
#include <stdio.h>
#include <inttypes.h>
#include "common_aarch64.h"
#include <lkmc.h>
#define CNTV_CTL_ENABLE (1 << 0)
#define CNTV_CTL_IMASK (1 << 1)
#define CNTV_CTL_ISTATUS (1 << 2)
/* Frequency in Hz. ? */
SYSREG_READ_WRITE(uint64_t, cntfrq_el0)
/* Current virtual counter value. */
SYSREG_READ(uint64_t, cntvct_el0)
/* Compare value. See: cntv_ctl_el0_enable. */
SYSREG_READ_WRITE(uint64_t, cntv_cval_el0)
/* On write, set cntv_cval_el0 = (cntvct_el0 + cntv_tval_el0).
* This means that the next interrupt will happen in cntv_tval_el0 cycles.
*/
SYSREG_READ_WRITE(uint64_t, cntv_tval_el0)
/* Control register. */
SYSREG_READ_WRITE(uint32_t, cntv_ctl_el0)
void cntv_ctl_el0_disable(void) {
sysreg_cntv_ctl_el0_write(sysreg_cntv_ctl_el0_read() & ~CNTV_CTL_ENABLE);
lkmc_sysreg_cntv_ctl_el0_write(lkmc_sysreg_cntv_ctl_el0_read() & ~CNTV_CTL_ENABLE);
}
/* If enabled, when: cntv_ctl > cntv_cval then:
@@ -34,25 +17,25 @@ void cntv_ctl_el0_disable(void) {
* * set CNTV_CTL_ISTATUS
*/
void cntv_ctl_el0_enable(void) {
sysreg_cntv_ctl_el0_write(sysreg_cntv_ctl_el0_read() | CNTV_CTL_ENABLE);
lkmc_sysreg_cntv_ctl_el0_write(lkmc_sysreg_cntv_ctl_el0_read() | CNTV_CTL_ENABLE);
}
int main(void) {
/* Initial state. */
printf("cntv_ctl_el0 0x%" PRIx32 "\n", sysreg_cntv_ctl_el0_read());
printf("cntfrq_el0 0x%" PRIx64 "\n", sysreg_cntfrq_el0_read());
printf("cntv_cval_el0 0x%" PRIx64 "\n", sysreg_cntv_cval_el0_read());
printf("cntv_ctl_el0 0x%" PRIx32 "\n", lkmc_sysreg_cntv_ctl_el0_read());
printf("cntfrq_el0 0x%" PRIx64 "\n", lkmc_sysreg_cntfrq_el0_read());
printf("cntv_cval_el0 0x%" PRIx64 "\n", lkmc_sysreg_cntv_cval_el0_read());
/* Get the counter value many times to watch the time pass. */
printf("cntvct_el0 0x%" PRIx64 "\n", sysreg_cntvct_el0_read());
printf("cntvct_el0 0x%" PRIx64 "\n", sysreg_cntvct_el0_read());
printf("cntvct_el0 0x%" PRIx64 "\n", sysreg_cntvct_el0_read());
printf("cntvct_el0 0x%" PRIx64 "\n", lkmc_sysreg_cntvct_el0_read());
printf("cntvct_el0 0x%" PRIx64 "\n", lkmc_sysreg_cntvct_el0_read());
printf("cntvct_el0 0x%" PRIx64 "\n", lkmc_sysreg_cntvct_el0_read());
#if 0
/* TODO crashes gem5. */
puts("cntfrq_el0 = 1");
sysreg_cntfrq_el0_write(1);
printf("cntfrq_el0 0x%" PRIx64 "\n", sysreg_cntfrq_el0_read());
lkmc_sysreg_cntfrq_el0_write(1);
printf("cntfrq_el0 0x%" PRIx64 "\n", lkmc_sysreg_cntfrq_el0_read());
#endif
return 0;