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author | Nobuhiro Iwamatsu <iwamatsu@nigauri.org> | 2015-10-09 10:40:09 +0300 |
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committer | Nobuhiro Iwamatsu <iwamatsu@nigauri.org> | 2016-08-17 04:25:28 +0300 |
commit | badbb63c2c29738a2956504126a30ddb14ca34c1 (patch) | |
tree | 29cb6dbc3cf6b34944b987e0a3619776905a59aa /arch/arm/mach-rmobile/lowlevel_init_ca15.S | |
parent | 59d07ee08e858bf2c121d0cdc6c8ddd3b26ee5b1 (diff) | |
download | u-boot-badbb63c2c29738a2956504126a30ddb14ca34c1.tar.xz |
ARM: rmobile: Move SoC sources to mach-rmobile
Move from arch/arm/cpu/armv7/rmobile/ to arch/arm/mach-rmobile/.
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Diffstat (limited to 'arch/arm/mach-rmobile/lowlevel_init_ca15.S')
-rw-r--r-- | arch/arm/mach-rmobile/lowlevel_init_ca15.S | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/arch/arm/mach-rmobile/lowlevel_init_ca15.S b/arch/arm/mach-rmobile/lowlevel_init_ca15.S new file mode 100644 index 0000000000..a5dbbea9e1 --- /dev/null +++ b/arch/arm/mach-rmobile/lowlevel_init_ca15.S @@ -0,0 +1,89 @@ +/* + * arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S + * This file is lager low level initialize. + * + * Copyright (C) 2013, 2014 Renesas Electronics Corporation + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <config.h> +#include <linux/linkage.h> + +ENTRY(lowlevel_init) + mrc p15, 0, r4, c0, c0, 5 /* mpidr */ + orr r4, r4, r4, lsr #6 + and r4, r4, #7 /* id 0-3 = ca15.0,1,2,3 */ + + b do_lowlevel_init + + .pool + +/* + * CPU ID #1-#3 come here + */ + .align 4 +do_cpu_waiting: + ldr r1, =0xe6180000 /* sysc */ +1: ldr r0, [r1, #0x20] /* sbar */ + tst r0, r0 + beq 1b + bx r0 + +/* + * Only CPU ID #0 comes here + */ + .align 4 +do_lowlevel_init: + ldr r2, =0xFF000044 /* PRR */ + ldr r1, [r2] + and r1, r1, #0x7F00 + lsrs r1, r1, #8 + cmp r1, #0x4C /* 0x4C is ID of r8a7794 */ + beq _enable_actlr_smp + + /* surpress wfe if ca15 */ + tst r4, #4 + mrceq p15, 0, r0, c1, c0, 1 /* actlr */ + orreq r0, r0, #(1<<7) + mcreq p15, 0, r0, c1, c0, 1 + + /* and set l2 latency */ + mrc p15, 0, r0, c0, c0, 5 /* r0 = MPIDR */ + and r0, r0, #0xf00 + lsr r0, r0, #8 + tst r0, #1 /* only need for cluster 0 */ + bne _exit_init_l2_a15 + + mrc p15, 1, r0, c9, c0, 2 /* r0 = L2CTLR */ + and r1, r0, #7 + cmp r1, #3 /* has already been set up */ + bicne r0, r0, #0xe7 + orrne r0, r0, #0x83 /* L2CTLR[7:6] + L2CTLR[2:0] */ +#if defined(CONFIG_R8A7790) + orrne r0, r0, #0x20 /* L2CTLR[5] */ +#endif + mcrne p15, 1, r0, c9, c0, 2 + + b _exit_init_l2_a15 + +_enable_actlr_smp: /* R8A7794 only (CA7) */ +#ifndef CONFIG_DCACHE_OFF + mrc p15, 0, r0, c1, c0, 1 + orr r0, r0, #0x40 + mcr p15, 0, r0, c1, c0, 1 +#endif + +_exit_init_l2_a15: + ldr r3, =(CONFIG_SYS_INIT_SP_ADDR) + sub sp, r3, #4 + str lr, [sp] + + /* initialize system */ + bl s_init + + ldr lr, [sp] + mov pc, lr + nop +ENDPROC(lowlevel_init) + .ltorg |