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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v1 3/3] xen/arm: Introduce support for Renesas R-Car Gen2 platform
From: Iurii Konovalenko <iurii.konovalenko@xxxxxxxxxxxxxxx>
Signed-off-by: Iurii Konovalenko <iurii.konovalenko@xxxxxxxxxxxxxxx>
---
xen/arch/arm/platforms/Makefile | 1 +
xen/arch/arm/platforms/shmobile.c | 149 +++++++++++++++++++++++++++++++
xen/include/asm-arm/platforms/shmobile.h | 24 +++++
3 files changed, 174 insertions(+)
create mode 100644 xen/arch/arm/platforms/shmobile.c
create mode 100644 xen/include/asm-arm/platforms/shmobile.h
diff --git a/xen/arch/arm/platforms/Makefile b/xen/arch/arm/platforms/Makefile
index 8f47c16..29e931a 100644
--- a/xen/arch/arm/platforms/Makefile
+++ b/xen/arch/arm/platforms/Makefile
@@ -4,5 +4,6 @@ obj-$(CONFIG_ARM_32) += exynos5.o
obj-$(CONFIG_ARM_32) += midway.o
obj-$(CONFIG_ARM_32) += omap5.o
obj-$(CONFIG_ARM_32) += sunxi.o
+obj-$(CONFIG_ARM_32) += shmobile.o
obj-$(CONFIG_ARM_64) += seattle.o
obj-$(CONFIG_ARM_64) += xgene-storm.o
diff --git a/xen/arch/arm/platforms/shmobile.c
b/xen/arch/arm/platforms/shmobile.c
new file mode 100644
index 0000000..4c78ed6
--- /dev/null
+++ b/xen/arch/arm/platforms/shmobile.c
@@ -0,0 +1,149 @@
+/*
+ * xen/arch/arm/platforms/shmobile.c
+ *
+ * Renesas R-Car Gen2 specific settings
+ *
+ * Iurii Konovalenko <iurii.konovalenko@xxxxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <asm/p2m.h>
+#include <xen/config.h>
+#include <xen/device_tree.h>
+#include <xen/domain_page.h>
+#include <xen/mm.h>
+#include <xen/vmap.h>
+#include <asm/platforms/shmobile.h>
+#include <asm/platform.h>
+#include <asm/io.h>
+
+u32 shmobile_read_mode_pins(void)
+{
+ static uint32_t mode;
+
+ void __iomem *modemr = ioremap_nocache(SHMOBILE_MODEMR, 4);
+ if( !modemr )
+ {
+ dprintk( XENLOG_ERR, "Unable to map shmobile Mode MR\n");
+ return 0;
+ }
+
+ mode = readl_relaxed(modemr);
+ iounmap(modemr);
+
+ return mode;
+}
+
+static int shmobile_init_time(void)
+{
+ uint32_t freq;
+ void __iomem *tmu;
+ int extal_mhz = 0;
+ uint32_t mode = shmobile_read_mode_pins();
+
+ /* At Linux boot time the Renesas R-Car Gen2 arch timer comes
+ * up with the counter disabled. Moreover, it may also report
+ * a potentially incorrect fixed 13 MHz frequency. To be
+ * correct these registers need to be updated to use the
+ * frequency EXTAL / 2 which can be determined by the MD pins.
+ */
+
+ switch ( mode & (MD(14) | MD(13)) ) {
+ case 0:
+ extal_mhz = 15;
+ break;
+ case MD(13):
+ extal_mhz = 20;
+ break;
+ case MD(14):
+ extal_mhz = 26;
+ break;
+ case MD(13) | MD(14):
+ extal_mhz = 30;
+ break;
+ }
+
+ /* The arch timer frequency equals EXTAL / 2 */
+ freq = extal_mhz * (1000000 / 2);
+
+ /* Remap "armgcnt address map" space */
+ tmu = ioremap_attr(SHMOBILE_ARCH_TIMER_BASE, PAGE_SIZE,
+ PAGE_HYPERVISOR_NOCACHE);
+ if ( !tmu )
+ {
+ dprintk(XENLOG_ERR, "Unable to map TMU\n");
+ return -ENOMEM;
+ }
+ /*
+ * Update the timer if it is either not running, or is not at the
+ * right frequency. The timer is only configurable in secure mode
+ * so this avoids an abort if the loader started the timer and
+ * entered the kernel in non-secure mode.
+ */
+
+ if ( (readl_relaxed(tmu + SHMOBILE_ARCH_TIMER_CNTCR) & 1) == 0 ||
+ readl_relaxed(tmu + SHMOBILE_ARCH_TIMER_CNTFID0) != freq ) {
+ /* Update registers with correct frequency */
+ writel_relaxed(freq, tmu + SHMOBILE_ARCH_TIMER_CNTFID0);
+
+ /* make sure arch timer is started by setting bit 0 of CNTCR */
+ writel_relaxed(1, tmu + SHMOBILE_ARCH_TIMER_CNTCR);
+ }
+
+ iounmap(tmu);
+
+ return 0;
+}
+
+static int __init shmobile_smp_init(void)
+{
+ void __iomem *p;
+ /* setup reset vectors */
+ p = ioremap_nocache(SHMOBILE_RAM, 0x1000);
+ if( !p )
+ {
+ dprintk( XENLOG_ERR, "Unable to map shmobile ICRAM\n");
+ return -ENOMEM;
+ }
+
+ writel_relaxed(__pa(init_secondary), p + SHMOBILE_SMP_START_OFFSET);
+ iounmap(p);
+
+ asm("sev;");
+
+ return 0;
+}
+
+static const char const *shmobile_dt_compat[] __initdata =
+{
+ "renesas,lager",
+ NULL
+};
+
+PLATFORM_START(shmobile, "Renesas R-Car Gen2")
+ .compatible = shmobile_dt_compat,
+ .init_time = shmobile_init_time,
+ .cpu_up = cpu_up_send_sgi,
+ .smp_init = shmobile_smp_init,
+
+ .dom0_gnttab_start = 0xc0000000,
+ .dom0_gnttab_size = 0x20000,
+PLATFORM_END
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/include/asm-arm/platforms/shmobile.h
b/xen/include/asm-arm/platforms/shmobile.h
new file mode 100644
index 0000000..fd506d7
--- /dev/null
+++ b/xen/include/asm-arm/platforms/shmobile.h
@@ -0,0 +1,24 @@
+#ifndef __ASM_ARM_PLATFORMS_SHMOBILE_H
+#define __ASM_ARM_PLATFORMS_SHMOBILE_H
+
+#define SHMOBILE_ARCH_TIMER_BASE 0xE6080000
+#define SHMOBILE_ARCH_TIMER_CNTCR 0x0
+#define SHMOBILE_ARCH_TIMER_CNTFID0 0x20
+
+#define SHMOBILE_MODEMR 0xE6160060
+#define SHMOBILE_RAM 0xE63C0000
+#define SHMOBILE_SMP_START_OFFSET 0xFFC
+
+#define MD(nr) BIT(nr)
+
+#endif /* __ASM_ARM_PLATFORMS_SHMOBILE_H */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
+
--
1.9.1
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