| 12345678910111213141516171819202122232425262728293031323334353637383940414243 |
- /*
- * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
- #include <linux/linkage.h>
- #include <asm/assembler.h>
- #include <asm/cp15.h>
- ENTRY(uniphier_smp_trampoline)
- ARM_BE8(setend be) @ ensure we are in BE8 mode
- mrc p15, 0, r0, c0, c0, 5 @ MPIDR (Multiprocessor Affinity Reg)
- and r2, r0, #0x3 @ CPU ID
- ldr r1, uniphier_smp_trampoline_jump
- ldr r3, uniphier_smp_trampoline_poll_addr
- mrc p15, 0, r0, c1, c0, 0 @ SCTLR (System Control Register)
- orr r0, r0, #CR_I @ Enable ICache
- bic r0, r0, #(CR_C | CR_M) @ Disable MMU and Dcache
- mcr p15, 0, r0, c1, c0, 0
- b 1f @ cache the following 5 instructions
- 0: wfe
- 1: ldr r0, [r3]
- cmp r0, r2
- bxeq r1 @ branch to secondary_startup
- b 0b
- .globl uniphier_smp_trampoline_jump
- uniphier_smp_trampoline_jump:
- .word 0 @ set virt_to_phys(secondary_startup)
- .globl uniphier_smp_trampoline_poll_addr
- uniphier_smp_trampoline_poll_addr:
- .word 0 @ set CPU ID to be kicked to this reg
- .globl uniphier_smp_trampoline_end
- uniphier_smp_trampoline_end:
- ENDPROC(uniphier_smp_trampoline)
|
