| /* |
| * Copyright (c) 2019-2020 Cobham Gaisler AB |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr/toolchain.h> |
| #include <zephyr/linker/sections.h> |
| #include <zephyr/arch/sparc/sparc.h> |
| |
| /* The trap table reset entry jumps to here. */ |
| |
| GTEXT(__sparc_trap_reset) |
| SECTION_FUNC(TEXT, __sparc_trap_reset) |
| set __sparc_trap_table, %g1 |
| wr %g1, %tbr |
| wr 2, %wim |
| wr PSR_PIL | PSR_S | PSR_PS | PSR_ET, %psr |
| /* NOTE: wrpsr above may have changed the current register window. */ |
| |
| /* We are in the 3 instruction wrpsr delay so use global registers. */ |
| set z_interrupt_stacks, %g2 |
| set CONFIG_ISR_STACK_SIZE, %g4 |
| add %g2, %g4, %g1 |
| and %g1, 0xfffffff0, %l3 |
| |
| /* |
| * According to SPARC ABI, Chapter 3: The system marks the deepest |
| * stack frame by setting the frame pointer to zero. No other frame's |
| * %fp has a zero value. |
| */ |
| sub %l3, 96, %sp |
| clr %fp |
| clr %i7 |
| |
| #ifdef CONFIG_INIT_STACKS |
| /* In-place memset() to avoid register window related traps. */ |
| set 0xaaaaaaaa, %l0 |
| mov %l0, %l1 |
| 1: |
| std %l0, [%g2] |
| add %g2, 8, %g2 |
| cmp %g2, %l3 |
| bne 1b |
| nop |
| #endif |
| |
| call z_bss_zero |
| nop |
| |
| call _PrepC |
| nop |
| |
| /* We halt the system by generating a "trap in trap" condition. */ |
| GTEXT(arch_system_halt) |
| SECTION_FUNC(TEXT, arch_system_halt) |
| mov %o0, %g0 |
| mov %g1, %g0 |
| set 1, %g1 |
| ta 0x00 |
