diff options
| author | Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> | 2013-11-21 17:06:45 +0900 |
|---|---|---|
| committer | Nobuhiro Iwamatsu <iwamatsu@nigauri.org> | 2013-12-03 09:45:20 +0900 |
| commit | 1d0e92782fd78b668977e45974c11d3eb517027c (patch) | |
| tree | 0a5fc93b2634481c7370717f1d6430ffa8ac8abf /arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S | |
| parent | 941b5a40a5012b1e3541f60ef94cc5a5b7f60721 (diff) | |
arm: rmobile: Add support R8A7790
Renesas R8A7790 is CPU with Cortex-A7 and A15.
This supports the basic register definition and GPIO and
framework of PFC.
Signed-off-by: Kouei Abe <kouei.abe.cp@renesas.com>
Signed-off-by: Ryo Kataoka <ryo.kataoka.wt@renesas.com>
Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
CC: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
CC: Albert Aribaud <albert.u.boot@aribaud.net>
Diffstat (limited to 'arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S')
| -rw-r--r-- | arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S b/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S new file mode 100644 index 0000000000..e07cc8093a --- /dev/null +++ b/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S @@ -0,0 +1,60 @@ +/* + * arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S + * This file is lager low level initialize. + * + * Copyright (C) 2013 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: + /* 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 */ + mrceq p15, 1, r0, c9, c0, 2 /* l2ctlr */ + orreq r0, r0, #0x00000800 + orreq r0, r0, #0x00000003 + mcreq p15, 1, r0, c9, c0, 2 + + 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 |