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kernel-ark/arch/arm/mach-realview/realview_eb.c
Russell King a53d6fb83e [ARM] realview: disable second GIC on RevB MPCore platforms 
The second GIC asserts a permanent interrupt on Rev.B MPCore platforms.
Disable initialisation of this GIC to avoid unbootable systems.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-09-13 15:10:25 +01:00

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6.0 KiB
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/*
* linux/arch/arm/mach-realview/realview_eb.c
*
* Copyright (C) 2004 ARM Limited
* Copyright (C) 2000 Deep Blue Solutions Ltd
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/sysdev.h>
#include <linux/amba/bus.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/leds.h>
#include <asm/mach-types.h>
#include <asm/hardware/gic.h>
#include <asm/hardware/icst307.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/mmc.h>
#include <asm/arch/irqs.h>
#include "core.h"
#include "clock.h"
static struct map_desc realview_eb_io_desc[] __initdata = {
{
.virtual = IO_ADDRESS(REALVIEW_SYS_BASE),
.pfn = __phys_to_pfn(REALVIEW_SYS_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_GIC_CPU_BASE),
.pfn = __phys_to_pfn(REALVIEW_GIC_CPU_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_GIC_DIST_BASE),
.pfn = __phys_to_pfn(REALVIEW_GIC_DIST_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
},
#ifdef CONFIG_REALVIEW_MPCORE
{
.virtual = IO_ADDRESS(REALVIEW_GIC1_CPU_BASE),
.pfn = __phys_to_pfn(REALVIEW_GIC1_CPU_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_GIC1_DIST_BASE),
.pfn = __phys_to_pfn(REALVIEW_GIC1_DIST_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_MPCORE_L220_BASE),
.pfn = __phys_to_pfn(REALVIEW_MPCORE_L220_BASE),
.length = SZ_8K,
.type = MT_DEVICE,
},
#endif
{
.virtual = IO_ADDRESS(REALVIEW_SCTL_BASE),
.pfn = __phys_to_pfn(REALVIEW_SCTL_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_TIMER0_1_BASE),
.pfn = __phys_to_pfn(REALVIEW_TIMER0_1_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_TIMER2_3_BASE),
.pfn = __phys_to_pfn(REALVIEW_TIMER2_3_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
},
#ifdef CONFIG_DEBUG_LL
{
.virtual = IO_ADDRESS(REALVIEW_UART0_BASE),
.pfn = __phys_to_pfn(REALVIEW_UART0_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}
#endif
};
static void __init realview_eb_map_io(void)
{
iotable_init(realview_eb_io_desc, ARRAY_SIZE(realview_eb_io_desc));
}
/* FPGA Primecells */
AMBA_DEVICE(aaci, "fpga:04", AACI, NULL);
AMBA_DEVICE(mmc0, "fpga:05", MMCI0, &realview_mmc0_plat_data);
AMBA_DEVICE(kmi0, "fpga:06", KMI0, NULL);
AMBA_DEVICE(kmi1, "fpga:07", KMI1, NULL);
AMBA_DEVICE(uart3, "fpga:09", UART3, NULL);
/* DevChip Primecells */
AMBA_DEVICE(smc, "dev:00", SMC, NULL);
AMBA_DEVICE(clcd, "dev:20", CLCD, &clcd_plat_data);
AMBA_DEVICE(dmac, "dev:30", DMAC, NULL);
AMBA_DEVICE(sctl, "dev:e0", SCTL, NULL);
AMBA_DEVICE(wdog, "dev:e1", WATCHDOG, NULL);
AMBA_DEVICE(gpio0, "dev:e4", GPIO0, NULL);
AMBA_DEVICE(gpio1, "dev:e5", GPIO1, NULL);
AMBA_DEVICE(gpio2, "dev:e6", GPIO2, NULL);
AMBA_DEVICE(rtc, "dev:e8", RTC, NULL);
AMBA_DEVICE(sci0, "dev:f0", SCI, NULL);
AMBA_DEVICE(uart0, "dev:f1", UART0, NULL);
AMBA_DEVICE(uart1, "dev:f2", UART1, NULL);
AMBA_DEVICE(uart2, "dev:f3", UART2, NULL);
AMBA_DEVICE(ssp0, "dev:f4", SSP, NULL);
static struct amba_device *amba_devs[] __initdata = {
&dmac_device,
&uart0_device,
&uart1_device,
&uart2_device,
&uart3_device,
&smc_device,
&clcd_device,
&sctl_device,
&wdog_device,
&gpio0_device,
&gpio1_device,
&gpio2_device,
&rtc_device,
&sci0_device,
&ssp0_device,
&aaci_device,
&mmc0_device,
&kmi0_device,
&kmi1_device,
};
static void __init gic_init_irq(void)
{
#ifdef CONFIG_REALVIEW_MPCORE
unsigned int pldctrl;
writel(0x0000a05f, __io_address(REALVIEW_SYS_LOCK));
pldctrl = readl(__io_address(REALVIEW_SYS_BASE) + REALVIEW_MPCORE_SYS_PLD_CTRL1);
pldctrl |= 0x00800000; /* New irq mode */
writel(pldctrl, __io_address(REALVIEW_SYS_BASE) + REALVIEW_MPCORE_SYS_PLD_CTRL1);
writel(0x00000000, __io_address(REALVIEW_SYS_LOCK));
#endif
gic_dist_init(0, __io_address(REALVIEW_GIC_DIST_BASE), 29);
gic_cpu_init(0, __io_address(REALVIEW_GIC_CPU_BASE));
#if defined(CONFIG_REALVIEW_MPCORE) && !defined(CONFIG_REALVIEW_MPCORE_REVB)
gic_dist_init(1, __io_address(REALVIEW_GIC1_DIST_BASE), 64);
gic_cpu_init(1, __io_address(REALVIEW_GIC1_CPU_BASE));
gic_cascade_irq(1, IRQ_EB_IRQ1);
#endif
}
static void __init realview_eb_init(void)
{
int i;
#ifdef CONFIG_REALVIEW_MPCORE
/* 1MB (128KB/way), 8-way associativity, evmon/parity/share enabled
* Bits: .... ...0 0111 1001 0000 .... .... .... */
l2x0_init(__io_address(REALVIEW_MPCORE_L220_BASE), 0x00790000, 0xfe000fff);
#endif
clk_register(&realview_clcd_clk);
platform_device_register(&realview_flash_device);
platform_device_register(&realview_smc91x_device);
platform_device_register(&realview_i2c_device);
for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
struct amba_device *d = amba_devs[i];
amba_device_register(d, &iomem_resource);
}
#ifdef CONFIG_LEDS
leds_event = realview_leds_event;
#endif
}
MACHINE_START(REALVIEW_EB, "ARM-RealView EB")
/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
.phys_io = REALVIEW_UART0_BASE,
.io_pg_offst = (IO_ADDRESS(REALVIEW_UART0_BASE) >> 18) & 0xfffc,
.boot_params = 0x00000100,
.map_io = realview_eb_map_io,
.init_irq = gic_init_irq,
.timer = &realview_timer,
.init_machine = realview_eb_init,
MACHINE_END
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