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/mach-tegra/cpu.c | |
| 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/mach-tegra/cpu.c')
| -rw-r--r-- | arch/arm/mach-tegra/cpu.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/arch/arm/mach-tegra/cpu.c b/arch/arm/mach-tegra/cpu.c index 1b6ad074ed..3d140760e6 100644 --- a/arch/arm/mach-tegra/cpu.c +++ b/arch/arm/mach-tegra/cpu.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Copyright (c) 2010-2015, NVIDIA CORPORATION. All rights reserved. + * Copyright (c) 2010-2019, NVIDIA CORPORATION. All rights reserved. */ #include <common.h> @@ -299,21 +299,19 @@ void enable_cpu_clock(int enable) static int is_cpu_powered(void) { - struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE; - - return (readl(&pmc->pmc_pwrgate_status) & CPU_PWRED) ? 1 : 0; + return (tegra_pmc_readl(offsetof(struct pmc_ctlr, + pmc_pwrgate_status)) & CPU_PWRED) ? 1 : 0; } static void remove_cpu_io_clamps(void) { - struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE; u32 reg; debug("%s entry\n", __func__); /* Remove the clamps on the CPU I/O signals */ - reg = readl(&pmc->pmc_remove_clamping); + reg = tegra_pmc_readl(offsetof(struct pmc_ctlr, pmc_remove_clamping)); reg |= CPU_CLMP; - writel(reg, &pmc->pmc_remove_clamping); + tegra_pmc_writel(reg, offsetof(struct pmc_ctlr, pmc_remove_clamping)); /* Give I/O signals time to stabilize */ udelay(IO_STABILIZATION_DELAY); @@ -321,17 +319,19 @@ static void remove_cpu_io_clamps(void) void powerup_cpu(void) { - struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE; u32 reg; int timeout = IO_STABILIZATION_DELAY; debug("%s entry\n", __func__); if (!is_cpu_powered()) { /* Toggle the CPU power state (OFF -> ON) */ - reg = readl(&pmc->pmc_pwrgate_toggle); + reg = tegra_pmc_readl(offsetof(struct pmc_ctlr, + pmc_pwrgate_toggle)); reg &= PARTID_CP; reg |= START_CP; - writel(reg, &pmc->pmc_pwrgate_toggle); + tegra_pmc_writel(reg, + offsetof(struct pmc_ctlr, + pmc_pwrgate_toggle)); /* Wait for the power to come up */ while (!is_cpu_powered()) { |