From: Dmitry Osipenko <digetx@gmail.com>
To: "Russell King" <linux@armlinux.org.uk>,
"Thierry Reding" <thierry.reding@gmail.com>,
"Jonathan Hunter" <jonathanh@nvidia.com>,
"Robert Yang" <decatf@gmail.com>,
"Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 1/8] ARM: trusted_foundations: Implement L2 cache initialization callback
Date: Mon, 18 Feb 2019 03:17:19 +0300 [thread overview]
Message-ID: <20190218001726.16785-2-digetx@gmail.com> (raw)
In-Reply-To: <20190218001726.16785-1-digetx@gmail.com>
Implement L2 cache initialization firmware callback that should be
invoked early during boot in order to set up the required outer cache
driver's callbacks.
Partially based on work done by Michał Mirosław [1].
[1] https://www.spinics.net/lists/arm-kernel/msg594765.html
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
arch/arm/firmware/trusted_foundations.c | 46 +++++++++++++++++++++++++
1 file changed, 46 insertions(+)
diff --git a/arch/arm/firmware/trusted_foundations.c b/arch/arm/firmware/trusted_foundations.c
index 689e6565abfc..3bf61a5933b9 100644
--- a/arch/arm/firmware/trusted_foundations.c
+++ b/arch/arm/firmware/trusted_foundations.c
@@ -18,8 +18,15 @@
#include <linux/init.h>
#include <linux/of.h>
#include <asm/firmware.h>
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/outercache.h>
#include <asm/trusted_foundations.h>
+#define TF_CACHE_MAINT 0xfffff100
+
+#define TF_CACHE_ENABLE 1
+#define TF_CACHE_DISABLE 2
+
#define TF_SET_CPU_BOOT_ADDR_SMC 0xfffff200
#define TF_CPU_PM 0xfffffffc
@@ -67,9 +74,48 @@ static int tf_prepare_idle(void)
return 0;
}
+#ifdef CONFIG_CACHE_L2X0
+static void tf_cache_write_sec(unsigned long val, unsigned int reg)
+{
+ static u32 l2x0_way_mask = 0xff;
+ static u32 l2x0_aux_ctrl = 0;
+
+ switch (reg) {
+ case L2X0_AUX_CTRL:
+ l2x0_aux_ctrl = val;
+
+ if (l2x0_aux_ctrl & BIT(16))
+ l2x0_way_mask = 0xffff;
+ break;
+
+ case L2X0_CTRL:
+ if (val == L2X0_CTRL_EN)
+ tf_generic_smc(TF_CACHE_MAINT, TF_CACHE_ENABLE,
+ l2x0_aux_ctrl);
+ else
+ tf_generic_smc(TF_CACHE_MAINT, TF_CACHE_DISABLE,
+ l2x0_way_mask);
+ break;
+
+ default:
+ break;
+ }
+}
+
+static int tf_init_cache(void)
+{
+ outer_cache.write_sec = tf_cache_write_sec;
+
+ return 0;
+}
+#endif /* CONFIG_CACHE_L2X0 */
+
static const struct firmware_ops trusted_foundations_ops = {
.set_cpu_boot_addr = tf_set_cpu_boot_addr,
.prepare_idle = tf_prepare_idle,
+#ifdef CONFIG_CACHE_L2X0
+ .l2x0_init = tf_init_cache,
+#endif
};
void register_trusted_foundations(struct trusted_foundations_platform_data *pd)
--
2.20.1
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next prev parent reply other threads:[~2019-02-18 0:19 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-18 0:17 [PATCH v4 0/8] Support Trusted Foundations firmware on Tegra30 Dmitry Osipenko
2019-02-18 0:17 ` Dmitry Osipenko [this message]
2019-02-18 0:17 ` [PATCH v4 2/8] ARM: trusted_foundations: Make prepare_idle call to take mode argument Dmitry Osipenko
2019-02-18 0:17 ` [PATCH v4 3/8] ARM: trusted_foundations: Provide information about whether firmware is registered Dmitry Osipenko
2019-02-18 0:17 ` [PATCH v4 4/8] ARM: tegra: Set up L2 cache using Trusted Foundations firmware Dmitry Osipenko
2019-02-18 0:17 ` [PATCH v4 5/8] ARM: tegra: Don't apply CPU erratas in insecure mode Dmitry Osipenko
2019-02-18 0:17 ` [PATCH v4 6/8] ARM: tegra: Always boot CPU in ARM-mode Dmitry Osipenko
2019-02-18 0:17 ` [PATCH v4 7/8] ARM: tegra: Support L2 cache maintenance done via firmware Dmitry Osipenko
2019-02-18 0:17 ` [PATCH v4 8/8] ARM: tegra: Add firmware calls required for suspend-resume Dmitry Osipenko
2019-02-18 8:51 ` [PATCH v4 0/8] Support Trusted Foundations firmware on Tegra30 Thierry Reding
2019-02-20 13:30 ` Dmitry Osipenko
2019-02-20 16:36 ` Michał Mirosław
2019-02-20 17:01 ` Dmitry Osipenko
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