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linux-kernel-test/arch/arm/mach-realview/realview_eb.c
Marc Zyngier 34ae6c96a6 ARM: 7298/1: realview: fix mapping of MPCore private memory region 
Since commit 0536bdf33f (ARM: move iotable mappings within
the vmalloc region), the RealView PB11MP cannot boot anymore.

This is caused by the way the mappings are described on this
platform (define replaced by hex values for clarity):

{	/* GIC CPU interface mapping */
        .virtual        = IO_ADDRESS(0x1F000100),
        .pfn            = __phys_to_pfn(0x1F000100),
        .length         = SZ_4K,
        .type           = MT_DEVICE,
}, {	/* GIC distributor mapping */
        .virtual        = IO_ADDRESS(0x1F001000),
        .pfn            = __phys_to_pfn(0x1F001000),
        .length         = SZ_4K,
        .type           = MT_DEVICE,
}

The first mapping ends up reserving two pages, and clashes with
the second one, which triggers a BUG_ON in vm_area_add_early().

In order to solve this problem, treat the MPCore private memory
region (containing the SCU, the GIC and the TWD) as a single region,
as described in the TRM:
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0360f/CACGDJJC.html

The EB11MP is converted the same way, even if it manages to avoid
the problem.

Tested on both PB11MP and EB11MP.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-01-25 09:24:36 +00:00

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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/device.h>
#include <linux/amba/bus.h>
#include <linux/amba/pl061.h>
#include <linux/amba/mmci.h>
#include <linux/amba/pl022.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/leds.h>
#include <asm/mach-types.h>
#include <asm/pmu.h>
#include <asm/pgtable.h>
#include <asm/hardware/gic.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/localtimer.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <mach/board-eb.h>
#include <mach/irqs.h>
#include "core.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_EB_GIC_CPU_BASE),
.pfn = __phys_to_pfn(REALVIEW_EB_GIC_CPU_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_EB_GIC_DIST_BASE),
.pfn = __phys_to_pfn(REALVIEW_EB_GIC_DIST_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_SCTL_BASE),
.pfn = __phys_to_pfn(REALVIEW_SCTL_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_EB_TIMER0_1_BASE),
.pfn = __phys_to_pfn(REALVIEW_EB_TIMER0_1_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_EB_TIMER2_3_BASE),
.pfn = __phys_to_pfn(REALVIEW_EB_TIMER2_3_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
},
#ifdef CONFIG_DEBUG_LL
{
.virtual = IO_ADDRESS(REALVIEW_EB_UART0_BASE),
.pfn = __phys_to_pfn(REALVIEW_EB_UART0_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}
#endif
};
static struct map_desc realview_eb11mp_io_desc[] __initdata = {
{
.virtual = IO_ADDRESS(REALVIEW_EB11MP_PRIV_MEM_BASE),
.pfn = __phys_to_pfn(REALVIEW_EB11MP_PRIV_MEM_BASE),
.length = REALVIEW_EB11MP_PRIV_MEM_SIZE,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_EB11MP_L220_BASE),
.pfn = __phys_to_pfn(REALVIEW_EB11MP_L220_BASE),
.length = SZ_8K,
.type = MT_DEVICE,
}
};
static void __init realview_eb_map_io(void)
{
iotable_init(realview_eb_io_desc, ARRAY_SIZE(realview_eb_io_desc));
if (core_tile_eb11mp() || core_tile_a9mp())
iotable_init(realview_eb11mp_io_desc, ARRAY_SIZE(realview_eb11mp_io_desc));
}
static struct pl061_platform_data gpio0_plat_data = {
.gpio_base = 0,
};
static struct pl061_platform_data gpio1_plat_data = {
.gpio_base = 8,
};
static struct pl061_platform_data gpio2_plat_data = {
.gpio_base = 16,
};
static struct pl022_ssp_controller ssp0_plat_data = {
.bus_id = 0,
.enable_dma = 0,
.num_chipselect = 1,
};
/*
* RealView EB AMBA devices
*/
/*
* These devices are connected via the core APB bridge
*/
#define GPIO2_IRQ { IRQ_EB_GPIO2, NO_IRQ }
#define GPIO3_IRQ { IRQ_EB_GPIO3, NO_IRQ }
#define AACI_IRQ { IRQ_EB_AACI, NO_IRQ }
#define MMCI0_IRQ { IRQ_EB_MMCI0A, IRQ_EB_MMCI0B }
#define KMI0_IRQ { IRQ_EB_KMI0, NO_IRQ }
#define KMI1_IRQ { IRQ_EB_KMI1, NO_IRQ }
/*
* These devices are connected directly to the multi-layer AHB switch
*/
#define EB_SMC_IRQ { NO_IRQ, NO_IRQ }
#define MPMC_IRQ { NO_IRQ, NO_IRQ }
#define EB_CLCD_IRQ { IRQ_EB_CLCD, NO_IRQ }
#define DMAC_IRQ { IRQ_EB_DMA, NO_IRQ }
/*
* These devices are connected via the core APB bridge
*/
#define SCTL_IRQ { NO_IRQ, NO_IRQ }
#define EB_WATCHDOG_IRQ { IRQ_EB_WDOG, NO_IRQ }
#define EB_GPIO0_IRQ { IRQ_EB_GPIO0, NO_IRQ }
#define GPIO1_IRQ { IRQ_EB_GPIO1, NO_IRQ }
#define EB_RTC_IRQ { IRQ_EB_RTC, NO_IRQ }
/*
* These devices are connected via the DMA APB bridge
*/
#define SCI_IRQ { IRQ_EB_SCI, NO_IRQ }
#define EB_UART0_IRQ { IRQ_EB_UART0, NO_IRQ }
#define EB_UART1_IRQ { IRQ_EB_UART1, NO_IRQ }
#define EB_UART2_IRQ { IRQ_EB_UART2, NO_IRQ }
#define EB_UART3_IRQ { IRQ_EB_UART3, NO_IRQ }
#define EB_SSP_IRQ { IRQ_EB_SSP, NO_IRQ }
/* FPGA Primecells */
AMBA_DEVICE(aaci, "fpga:aaci", AACI, NULL);
AMBA_DEVICE(mmc0, "fpga:mmc0", MMCI0, &realview_mmc0_plat_data);
AMBA_DEVICE(kmi0, "fpga:kmi0", KMI0, NULL);
AMBA_DEVICE(kmi1, "fpga:kmi1", KMI1, NULL);
AMBA_DEVICE(uart3, "fpga:uart3", EB_UART3, NULL);
/* DevChip Primecells */
AMBA_DEVICE(smc, "dev:smc", EB_SMC, NULL);
AMBA_DEVICE(clcd, "dev:clcd", EB_CLCD, &clcd_plat_data);
AMBA_DEVICE(dmac, "dev:dmac", DMAC, NULL);
AMBA_DEVICE(sctl, "dev:sctl", SCTL, NULL);
AMBA_DEVICE(wdog, "dev:wdog", EB_WATCHDOG, NULL);
AMBA_DEVICE(gpio0, "dev:gpio0", EB_GPIO0, &gpio0_plat_data);
AMBA_DEVICE(gpio1, "dev:gpio1", GPIO1, &gpio1_plat_data);
AMBA_DEVICE(gpio2, "dev:gpio2", GPIO2, &gpio2_plat_data);
AMBA_DEVICE(rtc, "dev:rtc", EB_RTC, NULL);
AMBA_DEVICE(sci0, "dev:sci0", SCI, NULL);
AMBA_DEVICE(uart0, "dev:uart0", EB_UART0, NULL);
AMBA_DEVICE(uart1, "dev:uart1", EB_UART1, NULL);
AMBA_DEVICE(uart2, "dev:uart2", EB_UART2, NULL);
AMBA_DEVICE(ssp0, "dev:ssp0", EB_SSP, &ssp0_plat_data);
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,
};
/*
* RealView EB platform devices
*/
static struct resource realview_eb_flash_resource = {
.start = REALVIEW_EB_FLASH_BASE,
.end = REALVIEW_EB_FLASH_BASE + REALVIEW_EB_FLASH_SIZE - 1,
.flags = IORESOURCE_MEM,
};
static struct resource realview_eb_eth_resources[] = {
[0] = {
.start = REALVIEW_EB_ETH_BASE,
.end = REALVIEW_EB_ETH_BASE + SZ_64K - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_EB_ETH,
.end = IRQ_EB_ETH,
.flags = IORESOURCE_IRQ,
},
};
/*
* Detect and register the correct Ethernet device. RealView/EB rev D
* platforms use the newer SMSC LAN9118 Ethernet chip
*/
static int eth_device_register(void)
{
void __iomem *eth_addr = ioremap(REALVIEW_EB_ETH_BASE, SZ_4K);
const char *name = NULL;
u32 idrev;
if (!eth_addr)
return -ENOMEM;
idrev = readl(eth_addr + 0x50);
if ((idrev & 0xFFFF0000) != 0x01180000)
/* SMSC LAN9118 not present, use LAN91C111 instead */
name = "smc91x";
iounmap(eth_addr);
return realview_eth_register(name, realview_eb_eth_resources);
}
static struct resource realview_eb_isp1761_resources[] = {
[0] = {
.start = REALVIEW_EB_USB_BASE,
.end = REALVIEW_EB_USB_BASE + SZ_128K - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_EB_USB,
.end = IRQ_EB_USB,
.flags = IORESOURCE_IRQ,
},
};
static struct resource pmu_resources[] = {
[0] = {
.start = IRQ_EB11MP_PMU_CPU0,
.end = IRQ_EB11MP_PMU_CPU0,
.flags = IORESOURCE_IRQ,
},
[1] = {
.start = IRQ_EB11MP_PMU_CPU1,
.end = IRQ_EB11MP_PMU_CPU1,
.flags = IORESOURCE_IRQ,
},
[2] = {
.start = IRQ_EB11MP_PMU_CPU2,
.end = IRQ_EB11MP_PMU_CPU2,
.flags = IORESOURCE_IRQ,
},
[3] = {
.start = IRQ_EB11MP_PMU_CPU3,
.end = IRQ_EB11MP_PMU_CPU3,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device pmu_device = {
.name = "arm-pmu",
.id = ARM_PMU_DEVICE_CPU,
.num_resources = ARRAY_SIZE(pmu_resources),
.resource = pmu_resources,
};
static struct resource char_lcd_resources[] = {
{
.start = REALVIEW_CHAR_LCD_BASE,
.end = (REALVIEW_CHAR_LCD_BASE + SZ_4K - 1),
.flags = IORESOURCE_MEM,
},
{
.start = IRQ_EB_CHARLCD,
.end = IRQ_EB_CHARLCD,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device char_lcd_device = {
.name = "arm-charlcd",
.id = -1,
.num_resources = ARRAY_SIZE(char_lcd_resources),
.resource = char_lcd_resources,
};
static void __init gic_init_irq(void)
{
if (core_tile_eb11mp() || core_tile_a9mp()) {
unsigned int pldctrl;
/* new irq mode */
writel(0x0000a05f, __io_address(REALVIEW_SYS_LOCK));
pldctrl = readl(__io_address(REALVIEW_SYS_BASE) + REALVIEW_EB11MP_SYS_PLD_CTRL1);
pldctrl |= 0x00800000;
writel(pldctrl, __io_address(REALVIEW_SYS_BASE) + REALVIEW_EB11MP_SYS_PLD_CTRL1);
writel(0x00000000, __io_address(REALVIEW_SYS_LOCK));
/* core tile GIC, primary */
gic_init(0, 29, __io_address(REALVIEW_EB11MP_GIC_DIST_BASE),
__io_address(REALVIEW_EB11MP_GIC_CPU_BASE));
#ifndef CONFIG_REALVIEW_EB_ARM11MP_REVB
/* board GIC, secondary */
gic_init(1, 96, __io_address(REALVIEW_EB_GIC_DIST_BASE),
__io_address(REALVIEW_EB_GIC_CPU_BASE));
gic_cascade_irq(1, IRQ_EB11MP_EB_IRQ1);
#endif
} else {
/* board GIC, primary */
gic_init(0, 29, __io_address(REALVIEW_EB_GIC_DIST_BASE),
__io_address(REALVIEW_EB_GIC_CPU_BASE));
}
}
/*
* Fix up the IRQ numbers for the RealView EB/ARM11MPCore tile
*/
static void realview_eb11mp_fixup(void)
{
/* AMBA devices */
dmac_device.irq[0] = IRQ_EB11MP_DMA;
uart0_device.irq[0] = IRQ_EB11MP_UART0;
uart1_device.irq[0] = IRQ_EB11MP_UART1;
uart2_device.irq[0] = IRQ_EB11MP_UART2;
uart3_device.irq[0] = IRQ_EB11MP_UART3;
clcd_device.irq[0] = IRQ_EB11MP_CLCD;
wdog_device.irq[0] = IRQ_EB11MP_WDOG;
gpio0_device.irq[0] = IRQ_EB11MP_GPIO0;
gpio1_device.irq[0] = IRQ_EB11MP_GPIO1;
gpio2_device.irq[0] = IRQ_EB11MP_GPIO2;
rtc_device.irq[0] = IRQ_EB11MP_RTC;
sci0_device.irq[0] = IRQ_EB11MP_SCI;
ssp0_device.irq[0] = IRQ_EB11MP_SSP;
aaci_device.irq[0] = IRQ_EB11MP_AACI;
mmc0_device.irq[0] = IRQ_EB11MP_MMCI0A;
mmc0_device.irq[1] = IRQ_EB11MP_MMCI0B;
kmi0_device.irq[0] = IRQ_EB11MP_KMI0;
kmi1_device.irq[0] = IRQ_EB11MP_KMI1;
/* platform devices */
realview_eb_eth_resources[1].start = IRQ_EB11MP_ETH;
realview_eb_eth_resources[1].end = IRQ_EB11MP_ETH;
realview_eb_isp1761_resources[1].start = IRQ_EB11MP_USB;
realview_eb_isp1761_resources[1].end = IRQ_EB11MP_USB;
}
static void __init realview_eb_timer_init(void)
{
unsigned int timer_irq;
timer0_va_base = __io_address(REALVIEW_EB_TIMER0_1_BASE);
timer1_va_base = __io_address(REALVIEW_EB_TIMER0_1_BASE) + 0x20;
timer2_va_base = __io_address(REALVIEW_EB_TIMER2_3_BASE);
timer3_va_base = __io_address(REALVIEW_EB_TIMER2_3_BASE) + 0x20;
if (core_tile_eb11mp() || core_tile_a9mp()) {
#ifdef CONFIG_LOCAL_TIMERS
twd_base = __io_address(REALVIEW_EB11MP_TWD_BASE);
#endif
timer_irq = IRQ_EB11MP_TIMER0_1;
} else
timer_irq = IRQ_EB_TIMER0_1;
realview_timer_init(timer_irq);
}
static struct sys_timer realview_eb_timer = {
.init = realview_eb_timer_init,
};
static void realview_eb_restart(char mode, const char *cmd)
{
void __iomem *reset_ctrl = __io_address(REALVIEW_SYS_RESETCTL);
void __iomem *lock_ctrl = __io_address(REALVIEW_SYS_LOCK);
/*
* To reset, we hit the on-board reset register
* in the system FPGA
*/
__raw_writel(REALVIEW_SYS_LOCK_VAL, lock_ctrl);
if (core_tile_eb11mp())
__raw_writel(0x0008, reset_ctrl);
dsb();
}
static void __init realview_eb_init(void)
{
int i;
if (core_tile_eb11mp() || core_tile_a9mp()) {
realview_eb11mp_fixup();
#ifdef CONFIG_CACHE_L2X0
/* 1MB (128KB/way), 8-way associativity, evmon/parity/share enabled
* Bits: .... ...0 0111 1001 0000 .... .... .... */
l2x0_init(__io_address(REALVIEW_EB11MP_L220_BASE), 0x00790000, 0xfe000fff);
#endif
platform_device_register(&pmu_device);
}
realview_flash_register(&realview_eb_flash_resource, 1);
platform_device_register(&realview_i2c_device);
platform_device_register(&char_lcd_device);
eth_device_register();
realview_usb_register(realview_eb_isp1761_resources);
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 */
.atag_offset = 0x100,
.fixup = realview_fixup,
.map_io = realview_eb_map_io,
.init_early = realview_init_early,
.init_irq = gic_init_irq,
.timer = &realview_eb_timer,
.handle_irq = gic_handle_irq,
.init_machine = realview_eb_init,
#ifdef CONFIG_ZONE_DMA
.dma_zone_size = SZ_256M,
#endif
.restart = realview_eb_restart,
MACHINE_END
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