riscv/kernel/head.S

1 /* SPDX-License-Identifier: GPL-2.0-only */
6 #include <asm/asm-offsets.h>
18 #include "efi-header.S"
23 	 * Image header expected by Linux boot-loaders. The image header data
32 	c.li s4,-13
42 	/* Image load offset (0MB) from start of RAM for M-mode */
54 	.dword _end - _start
63 	.word pe_head_start - _start
84 	la a2, 1f
108 1:
174 	 * Park this hart if we:
175 	 *  - have too many harts on CONFIG_RISCV_BOOT_SPINWAIT
176 	 *  - receive an early trap, before setup_trap_vector finished
177 	 *  - fail in smp_callin(), as a successful one wouldn't return
217 	li a0, -1
249 	/* Pick one hart to run the main boot sequence */
251 	li a2, 1
282 	/* Clear BSS for flat non-ELF images */
300 	addi sp, sp, -PT_SIZE_ON_STACK
322 	addi sp, sp, -PT_SIZE_ON_STACK
347 	 * This hart didn't win the lottery, so we wait for the winning hart to