[Xen-devel] [RFC 27/29] xen/arm: Add platform specific code for the exynos5

[Julien Grall <julien.grall@xxxxxxxxxx>]

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
---
 xen/arch/arm/platforms/Makefile         |    1 +
 xen/arch/arm/platforms/exynos5.c        |  105 +++++++++++++++++++++++++++++++
 xen/include/asm-arm/platforms/exynos5.h |   40 ++++++++++++
 3 files changed, 146 insertions(+)
 create mode 100644 xen/arch/arm/platforms/exynos5.c
 create mode 100644 xen/include/asm-arm/platforms/exynos5.h

diff --git a/xen/arch/arm/platforms/Makefile b/xen/arch/arm/platforms/Makefile
index 4313e95..ff2b65b 100644
--- a/xen/arch/arm/platforms/Makefile
+++ b/xen/arch/arm/platforms/Makefile
@@ -1 +1,2 @@
 obj-y += vexpress.o
+obj-y += exynos5.o
diff --git a/xen/arch/arm/platforms/exynos5.c b/xen/arch/arm/platforms/exynos5.c
new file mode 100644
index 0000000..01e12b7
--- /dev/null
+++ b/xen/arch/arm/platforms/exynos5.c
@@ -0,0 +1,105 @@
+/*
+ * xen/arch/arm/platforms/exynos5.c
+ *
+ * Exynos5 specific settings
+ *
+ * Julien Grall <julien.grall@xxxxxxxxxx>
+ * Copyright (c) 2013 Linaro Limited.
+ *
+ * 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 <asm/platforms/exynos5.h>
+#include <asm/platform.h>
+
+static int exynos5_init_time(void)
+{
+    uint32_t reg;
+
+    // enable timer on exynos5 arndale board
+    // should probably be done by u-boot
+    reg = platform_read_register(EXYNOS5_MCT_G_TCON);
+    platform_write_register(EXYNOS5_MCT_G_TCON, reg | 
EXYNOS5_MCT_G_TCON_START);
+
+    return 0;
+}
+
+/* Additionnal mapping for dom0 (Not in the DTS) */
+static int exynos5_specific_mapping(struct domain *d)
+{
+    paddr_t ma = 0;
+    uint32_t *dst;
+    int res;
+
+    /*
+     * Set temporary guest traps with 0xe14fff7c which is hvc(0xfffc)
+     * a hyp panic!
+     * TODO: Find why:
+     *  1) Xen abort directly after local_abort_enable when
+     *  the p2m_populate_ram is not here.
+     *  2) Linux doesn't start without this trick
+     */
+    p2m_populate_ram(d, 0x0, 0x1000 - 1);
+
+    res = gvirt_to_maddr(0, &ma);
+    if ( res )
+    {
+        printk(XENLOG_ERR "Unable to translate guest address\n");
+        return -EFAULT;
+    }
+
+    dst = map_domain_page(ma >> PAGE_SHIFT);
+    dst[2] = 0xe14fff7c;
+    unmap_domain_page(dst);
+
+    /* Map the chip ID */
+    map_mmio_regions(d, EXYNOS5_PA_CHIPID, EXYNOS5_PA_CHIPID + PAGE_SIZE - 1,
+                     EXYNOS5_PA_CHIPID);
+
+    /* Map the PWM region */
+    map_mmio_regions(d, EXYNOS5_PA_TIMER,
+                     EXYNOS5_PA_TIMER + (PAGE_SIZE * 2) - 1,
+                     EXYNOS5_PA_TIMER);
+
+    return 0;
+}
+
+static void exynos5_reset(void)
+{
+    platform_write_register(EXYNOS5_SWRESET, 1);
+}
+
+static const char const *exynos5_dt_compat[] __initdata =
+{
+    "samsung,exynos5250",
+    NULL
+};
+
+PLATFORM_START(exynos5, "SAMSUNG EXYNOS5")
+    .compatible = exynos5_dt_compat,
+    .init_time = exynos5_init_time,
+    .specific_mapping = exynos5_specific_mapping,
+    .reset = exynos5_reset,
+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/exynos5.h 
b/xen/include/asm-arm/platforms/exynos5.h
new file mode 100644
index 0000000..d77623c
--- /dev/null
+++ b/xen/include/asm-arm/platforms/exynos5.h
@@ -0,0 +1,40 @@
+#ifndef __ASM_ARM_PLATFORMS_EXYNOS5_H
+#define __ASM_ASM_PLATFORMS_EXYSNO5_H
+
+#define EXYNOS5_MCT_BASE            0x101c0000
+#define EXYNOS5_MCTREG(x)           (EXYNOS5_MCT_BASE + (x))
+#define EXYNOS5_MCT_G_TCON                 EXYNOS5_MCTREG(0x240)
+#define EXYNOS5_MCT_G_TCON_START       (1 << 8)
+
+#define EXYNOS5_PA_CHIPID           0x10000000
+#define EXYNOS5_PA_TIMER            0x12dd0000
+/* Base address of system controller */
+#define EXYNOS5_PA_PMU              0x10040000
+
+#define EXYNOS5_SWRESET             (EXYNOS5_PA_PMU + 0x0400)
+
+#define S5P_PA_SYSRAM   0x02020000
+
+/* Constants below is only used in assembly because the DTS is not yet parsed 
*/
+#ifdef __ASSEMBLY__
+
+/* GIC Base Address */
+#define EXYNOS5_GIC_BASE_ADDRESS    0x10480000
+
+/* Timer's frequency */
+#define EXYNOS5_TIMER_FREQUENCY     (24 * 1000 * 1000) /* 24 MHz */
+
+/* Arndale machine ID */
+#define MACH_TYPE_SMDK5250          3774
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_ARM_PLATFORMS_EXYNOS5_H */
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
-- 
Julien Grall


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