提交 ec0d84a8 编写于 作者: M Magnus Damm 提交者: Simon Horman

ARM: shmobile: Move headsmp-sh73a0.S to headsmp-scu.S

Rename headsmp-sh73a0.S into headsmp-scu.S and
introduce shmobile_secondary_vector_scu().

The goal is to be able to share the function
above between all mach-shmobile SoCs that use
SCU for SMP. So far only sh73a0 use this.

At this time the SCU base address is still hard
coded in headsmp-scu.S to 0xf0000000, but this
will be changed in the future.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>
上级 d8a28ed1
......@@ -15,7 +15,7 @@ obj-$(CONFIG_ARCH_EMEV2) += setup-emev2.o clock-emev2.o
# SMP objects
smp-y := platsmp.o headsmp.o
smp-$(CONFIG_HOTPLUG_CPU) += hotplug.o
smp-$(CONFIG_ARCH_SH73A0) += smp-sh73a0.o headsmp-sh73a0.o
smp-$(CONFIG_ARCH_SH73A0) += smp-sh73a0.o headsmp-scu.o
smp-$(CONFIG_ARCH_R8A7779) += smp-r8a7779.o
smp-$(CONFIG_ARCH_EMEV2) += smp-emev2.o
......
/*
* Shared SCU setup for mach-shmobile
*
* Copyright (C) 2012 Bastian Hecht
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/memory.h>
__CPUINIT
/*
* Reset vector for secondary CPUs.
*
* First we turn on L1 cache coherency for our CPU. Then we jump to
* shmobile_invalidate_start that invalidates the cache and hands over control
* to the common ARM startup code.
* This function will be mapped to address 0 by the SBAR register.
* A normal branch is out of range here so we need a long jump. We jump to
* the physical address as the MMU is still turned off.
*/
.align 12
ENTRY(shmobile_secondary_vector_scu)
mrc p15, 0, r0, c0, c0, 5 @ read MIPDR
and r0, r0, #3 @ mask out cpu ID
lsl r0, r0, #3 @ we will shift by cpu_id * 8 bits
mov r1, #0xf0000000 @ SCU base address
ldr r2, [r1, #8] @ SCU Power Status Register
mov r3, #3
bic r2, r2, r3, lsl r0 @ Clear bits of our CPU (Run Mode)
str r2, [r1, #8] @ write back
ldr pc, 1f
1: .long shmobile_invalidate_start - PAGE_OFFSET + PLAT_PHYS_OFFSET
ENDPROC(shmobile_secondary_vector_scu)
......@@ -8,6 +8,7 @@ extern void shmobile_setup_delay(unsigned int max_cpu_core_mhz,
struct twd_local_timer;
extern void shmobile_setup_console(void);
extern void shmobile_secondary_vector(void);
extern void shmobile_secondary_vector_scu(void);
struct clk;
extern int shmobile_clk_init(void);
extern void shmobile_handle_irq_intc(struct pt_regs *);
......@@ -44,7 +45,6 @@ extern void sh73a0_add_standard_devices_dt(void);
extern void sh73a0_clock_init(void);
extern void sh73a0_pinmux_init(void);
extern void sh73a0_pm_init(void);
extern void sh73a0_secondary_vector(void);
extern struct clk sh73a0_extal1_clk;
extern struct clk sh73a0_extal2_clk;
extern struct clk sh73a0_extcki_clk;
......
......@@ -72,9 +72,9 @@ static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus)
{
scu_enable(shmobile_scu_base);
/* Map the reset vector (in headsmp-sh73a0.S) */
/* Map the reset vector (in headsmp-scu.S) */
__raw_writel(0, APARMBAREA); /* 4k */
__raw_writel(__pa(sh73a0_secondary_vector), SBAR);
__raw_writel(__pa(shmobile_secondary_vector_scu), SBAR);
/* enable cache coherency on booting CPU */
scu_power_mode(shmobile_scu_base, SCU_PM_NORMAL);
......
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