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