[src/trunk]: src/sys/arch/arm/samsung Implement platform reset for exynos5

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d48bdbbd1d54
branches:  trunk
changeset: 354548:d48bdbbd1d54
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Tue Jun 20 19:13:34 2017 +0000

description:
Implement platform reset for exynos5

diffstat:

 sys/arch/arm/samsung/exynos_platform.c |  16 +++++++++++-----
 1 files changed, 11 insertions(+), 5 deletions(-)

diffs (52 lines):

diff -r af7ac2b39f9e -r d48bdbbd1d54 sys/arch/arm/samsung/exynos_platform.c
--- a/sys/arch/arm/samsung/exynos_platform.c    Tue Jun 20 19:03:04 2017 +0000
+++ b/sys/arch/arm/samsung/exynos_platform.c    Tue Jun 20 19:13:34 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: exynos_platform.c,v 1.5 2017/06/11 16:21:41 jmcneill Exp $ */
+/* $NetBSD: exynos_platform.c,v 1.6 2017/06/20 19:13:34 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2017 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -33,7 +33,7 @@
 #include "ukbd.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: exynos_platform.c,v 1.5 2017/06/11 16:21:41 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: exynos_platform.c,v 1.6 2017/06/20 19:13:34 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -57,6 +57,8 @@
 
 #include <arm/fdt/arm_fdtvar.h>
 
+#define        EXYNOS5_SWRESET_REG     0x10040400
+
 #define        DEVMAP_ALIGN(a) ((a) & ~L1_S_OFFSET)
 #define        DEVMAP_SIZE(s)  roundup2((s), L1_S_SIZE)
 #define        DEVMAP_ENTRY(va, pa, sz)                        \
@@ -124,9 +126,13 @@
 }
 
 static void
-exynos_platform_reset(void)
+exynos5_platform_reset(void)
 {
-       printf("%s: not implemented\n", __func__);
+       bus_space_tag_t bst = &armv7_generic_bs_tag;
+       bus_space_handle_t bsh;
+
+       bus_space_map(bst, EXYNOS5_SWRESET_REG, 4, 0, &bsh);
+       bus_space_write_4(bst, bsh, 0, 1);
 }
 
 static void
@@ -147,7 +153,7 @@
        .init_attach_args = exynos_platform_init_attach_args,
        .early_putchar = exynos_platform_early_putchar,
        .device_register = exynos_platform_device_register,
-       .reset = exynos_platform_reset,
+       .reset = exynos5_platform_reset,
        .delay = exynos_platform_delay,
        .uart_freq = exynos_platform_uart_freq,
 };