diff options
Diffstat (limited to 'arch/arm/mach-socfpga/misc.c')
| -rw-r--r-- | arch/arm/mach-socfpga/misc.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/mach-socfpga/misc.c b/arch/arm/mach-socfpga/misc.c index e3fa92f2e2..a6ff793c73 100644 --- a/arch/arm/mach-socfpga/misc.c +++ b/arch/arm/mach-socfpga/misc.c @@ -194,6 +194,16 @@ static uint32_t iswgrp_handoff[8]; int arch_early_init_r(void) { int i; + + /* + * Write magic value into magic register to unlock support for + * issuing warm reset. The ancient kernel code expects this + * value to be written into the register by the bootloader, so + * to support that old code, we write it here instead of in the + * reset_cpu() function just before reseting the CPU. + */ + writel(0xae9efebc, &sysmgr_regs->romcodegrp_warmramgrp_enable); + for (i = 0; i < 8; i++) /* Cache initial SW setting regs */ iswgrp_handoff[i] = readl(&sysmgr_regs->iswgrp_handoff[i]); |