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arm: socfpga: stratix10: Add cpu_has_been_warmreset()

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Add helper function cpu_has_been_warmreset() to check
if CPU is from warm reset boot.

Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
This commit is contained in:
Ley Foon Tan 2019-03-22 01:24:04 +08:00 • committed by Marek Vasut
parent 62e6278d1e
commit 8ab9daabe5
2 changed files with 12 additions and 0 deletions
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3
arch/arm/mach-socfpga/include/mach/reset_manager_s10.h
View file

@ -9,6 +9,7 @@
void reset_cpu(ulong addr);
void reset_deassert_peripherals_handoff(void);
int cpu_has_been_warmreset(void);
void socfpga_bridges_reset(int enable);
@ -47,6 +48,8 @@ struct socfpga_reset_manager {
#define RSTMGR_MPUMODRST_CORE0 0
#define RSTMGR_PER0MODRST_OCP_MASK 0x0020bf00
#define RSTMGR_BRGMODRST_DDRSCH_MASK 0X00000040
/* Watchdogs and MPU warm reset mask */
#define RSTMGR_L4WD_MPU_WARMRESET_MASK 0x000F0F00
/*
* Define a reset identifier, from which a permodrst bank ID

9
arch/arm/mach-socfpga/reset_manager_s10.c
View file

@ -103,3 +103,12 @@ void reset_deassert_peripherals_handoff(void)
writel(~RSTMGR_PER0MODRST_OCP_MASK, &reset_manager_base->per0modrst);
writel(0, &reset_manager_base->per0modrst);
}
/*
* Return non-zero if the CPU has been warm reset
*/
int cpu_has_been_warmreset(void)
{
return readl(&reset_manager_base->status) &
RSTMGR_L4WD_MPU_WARMRESET_MASK;
}