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Update the NIOSII port to enable longer jumps (#578)

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Update the NIOSII port so it works on systems with more RAM as
per https://forums.freertos.org/t/nios-ii-r-nios2-call26-noat-linker-error/16028
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RichardBarry 2022-10-19 22:04:53 -07:00 committed by GitHub
parent 4e2bf2c639
commit d7b712668d
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1 changed files with 22 additions and 21 deletions
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43
portable/GCC/NiosII/port_asm.S
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@ -27,12 +27,12 @@
*/
.extern vTaskSwitchContext
.set noat
# Exported to start the first task.
.globl restore_sp_from_pxCurrentTCB
.globl restore_sp_from_pxCurrentTCB
# Entry point for exceptions.
.section .exceptions.entry.user, "xa"
@ -41,15 +41,15 @@ save_context:
addi sp, sp, -116 # Create space on the stack.
stw ra, 0(sp)
# Leave a gap for muldiv 0
stw at, 8(sp)
stw at, 8(sp)
stw r2, 12(sp)
stw r3, 16(sp)
stw r4, 20(sp)
stw r5, 24(sp)
stw r6, 28(sp)
stw r7, 32(sp)
stw r8, 36(sp)
stw r9, 40(sp)
stw r5, 24(sp)
stw r6, 28(sp)
stw r7, 32(sp)
stw r8, 36(sp)
stw r9, 40(sp)
stw r10, 44(sp)
stw r11, 48(sp)
stw r12, 52(sp)
@ -76,12 +76,12 @@ save_sp_to_pxCurrentTCB:
ldw et, (et) # Load the value of the pxCurrentTCB pointer
stw sp, (et) # Store the stack pointer into the top of the TCB
br irq_test_user # skip the section .exceptions.entry
br irq_test_user # skip the section .exceptions.entry
.section .exceptions.irqtest, "xa"
.section .exceptions.irqtest, "xa"
irq_test_user:
.section .exceptions.exit.user, "xa"
.section .exceptions.exit.user, "xa"
restore_sp_from_pxCurrentTCB:
movia et, pxCurrentTCB # Load the address of the pxCurrentTCB pointer
ldw et, (et) # Load the value of the pxCurrentTCB pointer
@ -94,11 +94,11 @@ restore_context:
ldw r2, 12(sp)
ldw r3, 16(sp)
ldw r4, 20(sp)
ldw r5, 24(sp)
ldw r6, 28(sp)
ldw r7, 32(sp)
ldw r8, 36(sp)
ldw r9, 40(sp)
ldw r5, 24(sp)
ldw r6, 28(sp)
ldw r7, 32(sp)
ldw r8, 36(sp)
ldw r9, 40(sp)
ldw r10, 44(sp)
ldw r11, 48(sp)
ldw r12, 52(sp)
@ -120,8 +120,8 @@ restore_context:
ldw fp, 112(sp)
addi sp, sp, 116 # Release stack space
eret # Return to address ea, loading eStatus into Status.
eret # Return to address ea, loading eStatus into Status.
.section .exceptions.soft, "xa"
soft_exceptions:
movhi r3, 0x003b /* upper half of trap opcode */
@ -131,8 +131,9 @@ soft_exceptions:
call_scheduler:
stw ea, 72(sp) # EA is PC+4 so will skip over instruction causing exception
call vTaskSwitchContext # Pick the next context.
br restore_sp_from_pxCurrentTCB # Switch in the task context and restore.
movia r15, vTaskSwitchContext # Pick the next context - use long call version in place of "call"
callr r15
br restore_sp_from_pxCurrentTCB # Switch in the task context and restore.
.section .exceptions.unknown.user
exceptions_unknown_user: