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58adf1ba0d
On R-Car Gen2 and RZ/G1 platforms, we use the SBAR registers to make non boot CPUs run a routine designed to bring up SMP and deal with hot plug. The value contained in the SBAR registers is not initialized by a WDT triggered reset, which means that after a WDT triggered reset we jump to the SMP bring up routine, preventing the system from executing the bootrom code. The purpose of this patch is to jump to the bootrom code in case of a WDT triggered reset, and keep the SMP functionality untouched. In order to tell if the code had been called due to the WDT overflowing we are testing WOVF from register RWTCSRA. The new function shmobile_boot_vector_gen2 isn't replacing shmobile_boot_vector for backward compatibility reasons. The kernel will install the best option (either shmobile_boot_vector or shmobile_boot_vector_gen2) to ICRAM1 after parsing the device tree, according to the amount of memory available. Since shmobile_boot_vector has become bigger, "reg" property of nodes compatible with "renesas,smp-sram" now need to be set to a value greater or equal to "<0 0x60>". Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com> Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> [simon: dropped #ifdef from common.h] Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ARCH_MACH_COMMON_H
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#define __ARCH_MACH_COMMON_H
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extern void shmobile_init_cntvoff(void);
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extern void shmobile_init_delay(void);
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extern void shmobile_boot_vector(void);
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extern unsigned long shmobile_boot_fn;
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extern unsigned long shmobile_boot_size;
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extern void shmobile_boot_vector_gen2(void);
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extern unsigned long shmobile_boot_fn_gen2;
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extern unsigned long shmobile_boot_cpu_gen2;
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extern unsigned long shmobile_boot_size_gen2;
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extern void shmobile_smp_boot(void);
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extern void shmobile_smp_sleep(void);
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extern void shmobile_smp_hook(unsigned int cpu, unsigned long fn,
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unsigned long arg);
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extern bool shmobile_smp_cpu_can_disable(unsigned int cpu);
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extern bool shmobile_smp_init_fallback_ops(void);
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extern void shmobile_boot_apmu(void);
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extern void shmobile_boot_scu(void);
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extern void shmobile_smp_scu_prepare_cpus(phys_addr_t scu_base_phys,
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unsigned int max_cpus);
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extern void shmobile_smp_scu_cpu_die(unsigned int cpu);
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extern int shmobile_smp_scu_cpu_kill(unsigned int cpu);
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extern struct platform_suspend_ops shmobile_suspend_ops;
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#ifdef CONFIG_SUSPEND
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int shmobile_suspend_init(void);
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void shmobile_smp_apmu_suspend_init(void);
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#else
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static inline int shmobile_suspend_init(void) { return 0; }
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static inline void shmobile_smp_apmu_suspend_init(void) { }
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#endif
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static inline void __init shmobile_init_late(void)
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{
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shmobile_suspend_init();
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}
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#endif /* __ARCH_MACH_COMMON_H */
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