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ARM: shmobile: rcar-gen2: Add watchdog support

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This patch adds watchdog support by installing shmobile_boot_vector_gen2
to ICRAM1 when enough memory is available, in which case we also keep a
copy of MPIDR to complete the reset vector logic.

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Fabrizio Castro 2018-02-12 17:44:19 +00:00 committed by Simon Horman
parent 58adf1ba0d
commit 01d675f159
2 changed files with 13 additions and 3 deletions
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1
arch/arm/mach-shmobile/platsmp-apmu.c
View File

@ -191,6 +191,7 @@ static void __init shmobile_smp_apmu_setup_boot(void)
{
/* install boot code shared by all CPUs */
shmobile_boot_fn = __pa_symbol(shmobile_smp_boot);
shmobile_boot_fn_gen2 = shmobile_boot_fn;
}
void __init shmobile_smp_apmu_prepare_cpus(unsigned int max_cpus,

15
arch/arm/mach-shmobile/pm-rcar-gen2.c
View File

@ -17,6 +17,7 @@
#include <linux/smp.h>
#include <linux/soc/renesas/rcar-sysc.h>
#include <asm/io.h>
#include <asm/cputype.h>
#include "common.h"
#include "rcar-gen2.h"
@ -37,7 +38,6 @@
#define CA7RESCNT_CODE 0x5a5a0000
#define CA7RESCNT_CPUS 0xf /* CPU0-3 */
/* On-chip RAM */
#define ICRAM1 0xe63c0000 /* Inter Connect RAM1 (4 KiB) */
@ -119,8 +119,17 @@ map:
p = ioremap(res.start, resource_size(&res));
if (!p)
return;
memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
/*
* install the reset vector, use the largest version if we have enough
* memory available
*/
if (resource_size(&res) >= shmobile_boot_size_gen2) {
shmobile_boot_cpu_gen2 = read_cpuid_mpidr();
memcpy_toio(p, shmobile_boot_vector_gen2,
shmobile_boot_size_gen2);
} else {
memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
}
iounmap(p);
/* setup reset vectors */