mirror of https://github.com/hak5/openwrt.git
74 lines
2.4 KiB
Diff
74 lines
2.4 KiB
Diff
From 51d6e1924fd0e9d075bcef61bea5a475a0ad6634 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
Date: Wed, 20 Feb 2019 08:49:39 +0000
|
|
Subject: [PATCH] arm: bcm2835: Fix FIQ early ioremap
|
|
|
|
The ioremapping creates mappings within the vmalloc area. The
|
|
equivalent early function, create_mapping, now checks that the
|
|
requested explicit virtual address is between VMALLOC_START and
|
|
VMALLOC_END. As there is no reason to have any correlation between
|
|
the physical and virtual addresses, put the required mappings at
|
|
VMALLOC_START and above.
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
|
|
---
|
|
arch/arm/mach-bcm/board_bcm2835.c | 21 +++++++++++++++------
|
|
1 file changed, 15 insertions(+), 6 deletions(-)
|
|
|
|
--- a/arch/arm/mach-bcm/board_bcm2835.c
|
|
+++ b/arch/arm/mach-bcm/board_bcm2835.c
|
|
@@ -14,17 +14,20 @@
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/irqchip.h>
|
|
+#include <linux/mm.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_fdt.h>
|
|
#include <asm/system_info.h>
|
|
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
+#include <asm/memory.h>
|
|
+#include <asm/pgtable.h>
|
|
|
|
#include "platsmp.h"
|
|
|
|
-#define BCM2835_USB_VIRT_BASE 0xf0980000
|
|
-#define BCM2835_USB_VIRT_MPHI 0xf0006000
|
|
+#define BCM2835_USB_VIRT_BASE (VMALLOC_START)
|
|
+#define BCM2835_USB_VIRT_MPHI (VMALLOC_START + 0x10000)
|
|
|
|
static void __init bcm2835_init(void)
|
|
{
|
|
@@ -83,20 +86,26 @@ static int __init bcm2835_map_usb(unsign
|
|
|
|
static void __init bcm2835_map_io(void)
|
|
{
|
|
- const __be32 *ranges;
|
|
+ const __be32 *ranges, *address_cells;
|
|
+ unsigned long root, addr_cells;
|
|
int soc, len;
|
|
unsigned long p2b_offset;
|
|
|
|
debug_ll_io_init();
|
|
|
|
+ root = of_get_flat_dt_root();
|
|
/* Find out how to map bus to physical address first from soc/ranges */
|
|
- soc = of_get_flat_dt_subnode_by_name(of_get_flat_dt_root(), "soc");
|
|
+ soc = of_get_flat_dt_subnode_by_name(root, "soc");
|
|
if (soc < 0)
|
|
return;
|
|
+ address_cells = of_get_flat_dt_prop(root, "#address-cells", &len);
|
|
+ if (!address_cells || len < (sizeof(unsigned long)))
|
|
+ return;
|
|
+ addr_cells = be32_to_cpu(address_cells[0]);
|
|
ranges = of_get_flat_dt_prop(soc, "ranges", &len);
|
|
- if (!ranges || len < (sizeof(unsigned long) * 3))
|
|
+ if (!ranges || len < (sizeof(unsigned long) * (2 + addr_cells)))
|
|
return;
|
|
- p2b_offset = be32_to_cpu(ranges[0]) - be32_to_cpu(ranges[1]);
|
|
+ p2b_offset = be32_to_cpu(ranges[0]) - be32_to_cpu(ranges[addr_cells]);
|
|
|
|
/* Now search for bcm2708-usb node in device tree */
|
|
of_scan_flat_dt(bcm2835_map_usb, &p2b_offset);
|