OVMS3-idf/components/esp32/dport_int.S

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ArmAsm
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#include <xtensa/coreasm.h>
#include <xtensa/corebits.h>
#include <xtensa/config/system.h>
#include <xtensa/simcall.h>
#include "esp_panic.h"
#include "sdkconfig.h"
#include "soc/soc.h"
#include "soc/dport_reg.h"
#include "freertos/xtensa_context.h"
#define L5_INTR_STACK_SIZE 8
#define L5_INTR_A2_OFFSET 0
#define L5_INTR_A3_OFFSET 4
.data
_l5_intr_stack:
.space L5_INTR_STACK_SIZE
.section .iram1,"ax"
.global xt_highint5
.type _xt_highint5,@function
.align 4
xt_highint5:
#ifdef XT_INTEXC_HOOKS
/* Call interrupt hook if present to (pre)handle interrupts. */
movi a0, _xt_intexc_hooks
l32i a0, a0, 5<<2
beqz a0, 1f
.Ln_xt_highint5_call_hook:
callx0 a0 /* must NOT disturb stack! */
1:
#endif
/* This section is for access dport register protection */
/* Allocate exception frame and save minimal context. */
/* Because the interrupt cause code have protection that only
allow one cpu enter in L5 interrupt at one time, so
there needn't have two _l5_intr_stack for each cpu */
movi a0, _l5_intr_stack
s32i a2, a0, L5_INTR_A2_OFFSET
s32i a3, a0, L5_INTR_A3_OFFSET
/* Check interrupt */
rsr a0, INTERRUPT
extui a0, a0, ETS_DPORT_INUM, 1 /* get dport int bit */
beqz a0, 1f
/* handle dport interrupt */
/* get CORE_ID */
getcoreid a0
beqz a0, 2f
/* current cpu is 1 */
movi a0, DPORT_CPU_INTR_FROM_CPU_3_REG
movi a2, 0
s32i a2, a0, 0 /* clear intr */
movi a0, 0 /* other cpu id */
j 3f
2:
/* current cpu is 0 */
movi a0, DPORT_CPU_INTR_FROM_CPU_2_REG
movi a2, 0
s32i a2, a0, 0 /* clear intr */
movi a0, 1 /* other cpu id */
3:
/* set and wait flag */
movi a2, dport_access_start
addx4 a2, a0, a2
movi a3, 1
s32i a3, a2, 0
memw
movi a2, dport_access_end
addx4 a2, a0, a2
.check_dport_access_end:
l32i a3, a2, 0
beqz a3, .check_dport_access_end
1:
movi a0, _l5_intr_stack
l32i a2, a0, L5_INTR_A2_OFFSET
l32i a3, a0, L5_INTR_A3_OFFSET
rsync /* ensure register restored */
rsr a0, EXCSAVE_5 /* restore a0 */
rfi 5
.align 4
.L_xt_highint5_exit:
rsr a0, EXCSAVE_5 /* restore a0 */
rfi 5
/* The linker has no reason to link in this file; all symbols it exports are already defined
(weakly!) in the default int handler. Define a symbol here so we can use it to have the
linker inspect this anyway. */
.global ld_include_dport_int
ld_include_dport_int: