From a18b658449e6677aba2bf8dcd3593adecff6fe4d Mon Sep 17 00:00:00 2001
From: Lennert Buytenhek <buytenh@wantstofly.org>
Date: Sat, 10 May 2008 23:20:50 +0200
Subject: [PATCH] [ARM] Orion: make window setup a little more safe
Currently, Orion window setup uses hardcoded window indexes for each
of the boot/cs0/cs1/cs2/PCIe WA windows. The static window allocation
used can clash if board support code will ever attempt to configure
both a dev2 and a PCIe WA window, as both of those use CPU mbus window
#7 at present.
This patch keeps track of the last used window, and opens subsequently
requested windows sequentially, starting from 4. (Windows 0-3 are used
as MEM/IO windows for the PCI/PCIe buses.)
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
---
arch/arm/mach-orion5x/addr-map.c | 23 ++++++++++++++++++-----
1 file changed, 18 insertions(+), 5 deletions(-)
diff --git a/arch/arm/mach-orion5x/addr-map.c b/arch/arm/mach-orion5x/addr-map.c
index e63fb05dc893..5ffbac9e1570 100644
--- a/arch/arm/mach-orion5x/addr-map.c
+++ b/arch/arm/mach-orion5x/addr-map.c
@@ -70,6 +70,7 @@
struct mbus_dram_target_info orion5x_mbus_dram_info;
+static int __initdata win_alloc_count;
static int __init orion5x_cpu_win_can_remap(int win)
{
@@ -87,6 +88,12 @@ static int __init orion5x_cpu_win_can_remap(int win)
static void __init setup_cpu_win(int win, u32 base, u32 size,
u8 target, u8 attr, int remap)
{
+ if (win >= 8) {
+ printk(KERN_ERR "setup_cpu_win: trying to allocate "
+ "window %d\n", win);
+ return;
+ }
+
orion5x_write(CPU_WIN_BASE(win), base & 0xffff0000);
orion5x_write(CPU_WIN_CTRL(win),
((size - 1) & 0xffff0000) | (attr << 8) | (target << 4) | 1);
@@ -128,6 +135,7 @@ void __init orion5x_setup_cpu_mbus_bridge(void)
TARGET_PCIE, ATTR_PCIE_MEM, -1);
setup_cpu_win(3, ORION5X_PCI_MEM_PHYS_BASE, ORION5X_PCI_MEM_SIZE,
TARGET_PCI, ATTR_PCI_MEM, -1);
+ win_alloc_count = 4;
/*
* Setup MBUS dram target info.
@@ -156,25 +164,30 @@ void __init orion5x_setup_cpu_mbus_bridge(void)
void __init orion5x_setup_dev_boot_win(u32 base, u32 size)
{
- setup_cpu_win(4, base, size, TARGET_DEV_BUS, ATTR_DEV_BOOT, -1);
+ setup_cpu_win(win_alloc_count++, base, size,
+ TARGET_DEV_BUS, ATTR_DEV_BOOT, -1);
}
void __init orion5x_setup_dev0_win(u32 base, u32 size)
{
- setup_cpu_win(5, base, size, TARGET_DEV_BUS, ATTR_DEV_CS0, -1);
+ setup_cpu_win(win_alloc_count++, base, size,
+ TARGET_DEV_BUS, ATTR_DEV_CS0, -1);
}
void __init orion5x_setup_dev1_win(u32 base, u32 size)
{
- setup_cpu_win(6, base, size, TARGET_DEV_BUS, ATTR_DEV_CS1, -1);
+ setup_cpu_win(win_alloc_count++, base, size,
+ TARGET_DEV_BUS, ATTR_DEV_CS1, -1);
}
void __init orion5x_setup_dev2_win(u32 base, u32 size)
{
- setup_cpu_win(7, base, size, TARGET_DEV_BUS, ATTR_DEV_CS2, -1);
+ setup_cpu_win(win_alloc_count++, base, size,
+ TARGET_DEV_BUS, ATTR_DEV_CS2, -1);
}
void __init orion5x_setup_pcie_wa_win(u32 base, u32 size)
{
- setup_cpu_win(7, base, size, TARGET_PCIE, ATTR_PCIE_WA, -1);
+ setup_cpu_win(win_alloc_count++, base, size,
+ TARGET_PCIE, ATTR_PCIE_WA, -1);
}
--
2.34.1