| /* |
| * Copyright (C) 2013 Panasonic Corporation |
| * Author: Masahiro Yamada <yamada.m@jp.panasonic.com> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <config.h> |
| #include <linux/linkage.h> |
| #include <asm/system.h> |
| #include <asm/arch/led.h> |
| #include <asm/arch/sbc-regs.h> |
| |
| /* Entry point of U-Boot main program for the secondary CPU */ |
| LENTRY(secondary_entry) |
| mrc p15, 0, r0, c1, c0, 0 @ SCTLR (System Contrl Register) |
| bic r0, r0, #(CR_C | CR_M) @ MMU and Dcache disable |
| mcr p15, 0, r0, c1, c0, 0 |
| mcr p15, 0, r0, c8, c7, 0 @ invalidate TLBs |
| mcr p15, 0, r0, c7, c5, 0 @ invalidate icache |
| dsb |
| led_write(C,0,,) |
| ldr r1, =ROM_BOOT_ROMRSV2 |
| mov r0, #0 |
| str r0, [r1] |
| 0: wfe |
| ldr r4, [r1] @ r4: entry point for secondary CPUs |
| cmp r4, #0 |
| beq 0b |
| led_write(C, P, U, 1) |
| bx r4 @ secondary CPUs jump to linux |
| ENDPROC(secondary_entry) |
| |
| ENTRY(wakeup_secondary) |
| ldr r1, =ROM_BOOT_ROMRSV2 |
| 0: ldr r0, [r1] |
| cmp r0, #0 |
| bne 0b |
| |
| /* set entry address and send event to the secondary CPU */ |
| ldr r0, =secondary_entry |
| str r0, [r1] |
| ldr r0, [r1] @ make sure store is complete |
| mov r0, #0x100 |
| 0: subs r0, r0, #1 @ I don't know the reason, but without this wait |
| bne 0b @ fails to wake up the secondary CPU |
| sev |
| |
| /* wait until the secondary CPU reach to secondary_entry */ |
| 0: ldr r0, [r1] |
| cmp r0, #0 |
| bne 0b |
| bx lr |
| ENDPROC(wakeup_secondary) |