74 lines
2.4 KiB
Diff
74 lines
2.4 KiB
Diff
From d9deb3700dd28463c329494f76870c6784e50309 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Wed, 20 Feb 2019 08:49:39 +0000
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Subject: [PATCH] arm: bcm2835: Fix FIQ early ioremap
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The ioremapping creates mappings within the vmalloc area. The
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equivalent early function, create_mapping, now checks that the
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requested explicit virtual address is between VMALLOC_START and
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VMALLOC_END. As there is no reason to have any correlation between
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the physical and virtual addresses, put the required mappings at
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VMALLOC_START and above.
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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arch/arm/mach-bcm/board_bcm2835.c | 21 +++++++++++++++------
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1 file changed, 15 insertions(+), 6 deletions(-)
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--- a/arch/arm/mach-bcm/board_bcm2835.c
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+++ b/arch/arm/mach-bcm/board_bcm2835.c
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@@ -5,17 +5,20 @@
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#include <linux/init.h>
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#include <linux/irqchip.h>
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+#include <linux/mm.h>
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#include <linux/of_address.h>
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#include <linux/of_fdt.h>
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#include <asm/system_info.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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+#include <asm/memory.h>
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+#include <asm/pgtable.h>
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#include "platsmp.h"
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-#define BCM2835_USB_VIRT_BASE 0xf0980000
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-#define BCM2835_USB_VIRT_MPHI 0xf0006000
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+#define BCM2835_USB_VIRT_BASE (VMALLOC_START)
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+#define BCM2835_USB_VIRT_MPHI (VMALLOC_START + 0x10000)
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static void __init bcm2835_init(void)
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{
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@@ -74,20 +77,26 @@ static int __init bcm2835_map_usb(unsign
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static void __init bcm2835_map_io(void)
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{
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- const __be32 *ranges;
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+ const __be32 *ranges, *address_cells;
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+ unsigned long root, addr_cells;
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int soc, len;
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unsigned long p2b_offset;
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debug_ll_io_init();
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+ root = of_get_flat_dt_root();
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/* Find out how to map bus to physical address first from soc/ranges */
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- soc = of_get_flat_dt_subnode_by_name(of_get_flat_dt_root(), "soc");
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+ soc = of_get_flat_dt_subnode_by_name(root, "soc");
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if (soc < 0)
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return;
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+ address_cells = of_get_flat_dt_prop(root, "#address-cells", &len);
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+ if (!address_cells || len < (sizeof(unsigned long)))
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+ return;
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+ addr_cells = be32_to_cpu(address_cells[0]);
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ranges = of_get_flat_dt_prop(soc, "ranges", &len);
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- if (!ranges || len < (sizeof(unsigned long) * 3))
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+ if (!ranges || len < (sizeof(unsigned long) * (2 + addr_cells)))
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return;
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- p2b_offset = be32_to_cpu(ranges[0]) - be32_to_cpu(ranges[1]);
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+ p2b_offset = be32_to_cpu(ranges[0]) - be32_to_cpu(ranges[addr_cells]);
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/* Now search for bcm2708-usb node in device tree */
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of_scan_flat_dt(bcm2835_map_usb, &p2b_offset);
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