diff options
| author | Thierry Reding <treding@nvidia.com> | 2019-04-15 11:32:25 +0200 |
|---|---|---|
| committer | Tom Warren <twarren@nvidia.com> | 2019-06-05 09:16:34 -0700 |
| commit | f9ec2ec8504aa5d94d5be7f43c743040e549b157 (patch) | |
| tree | 7c68e815ecd3606853e85c899917ee3c95e91942 /arch/arm/include/asm/arch-tegra/pmc.h | |
| parent | 147fac6aef043b41a48b3ad87639c6872da298f1 (diff) | |
ARM: tegra: Support TZ-only access to PMC
Some devices may restrict access to the PMC to TrustZone software only.
Non-TZ software can detect this and use SMC calls to the firmware that
runs in the TrustZone to perform accesses to PMC registers.
Note that this also fixes reset_cpu() and the enterrcm command on
Tegra186 where they were previously trying to access the PMC at a wrong
physical address.
Based on work by Kalyani Chidambaram <kalyanic@nvidia.com> and Tom
Warren <twarren@nvidia.com>.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'arch/arm/include/asm/arch-tegra/pmc.h')
| -rw-r--r-- | arch/arm/include/asm/arch-tegra/pmc.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/arm/include/asm/arch-tegra/pmc.h b/arch/arm/include/asm/arch-tegra/pmc.h index 34bbe75d5f..1524bf2911 100644 --- a/arch/arm/include/asm/arch-tegra/pmc.h +++ b/arch/arm/include/asm/arch-tegra/pmc.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0+ */ /* - * (C) Copyright 2010-2015 + * (C) Copyright 2010-2019 * NVIDIA Corporation <www.nvidia.com> */ @@ -388,4 +388,22 @@ struct pmc_ctlr { /* APBDEV_PMC_CNTRL2_0 0x440 */ #define HOLD_CKE_LOW_EN (1 << 12) +/* PMC read/write functions */ +u32 tegra_pmc_readl(unsigned long offset); +void tegra_pmc_writel(u32 value, unsigned long offset); + +#define PMC_CNTRL 0x0 +#define PMC_CNTRL_MAIN_RST BIT(4) + +#if IS_ENABLED(CONFIG_TEGRA186) +# define PMC_SCRATCH0 0x32000 +#else +# define PMC_SCRATCH0 0x00050 +#endif + +/* for secure PMC */ +#define TEGRA_SMC_PMC 0xc2fffe00 +#define TEGRA_SMC_PMC_READ 0xaa +#define TEGRA_SMC_PMC_WRITE 0xbb + #endif /* PMC_H */ |