diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0454-arm-bcm2835-Fix-FIQ-early-ioremap.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0454-arm-bcm2835-Fix-FIQ-early-ioremap.patch | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0454-arm-bcm2835-Fix-FIQ-early-ioremap.patch b/target/linux/bcm27xx/patches-4.19/950-0454-arm-bcm2835-Fix-FIQ-early-ioremap.patch new file mode 100644 index 0000000000..d320e40c41 --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0454-arm-bcm2835-Fix-FIQ-early-ioremap.patch @@ -0,0 +1,73 @@ +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); |