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linux/arch/ppc/platforms/4xx/taishan.c
Benjamin Herrenschmidt e701d269aa [POWERPC] 4xx: Fix 4xx flush_tlb_page() 
On 4xx CPUs, the current implementation of flush_tlb_page() uses
a low level _tlbie() assembly function that only works for the
current PID. Thus, invalidations caused by, for example, a COW
fault triggered by get_user_pages() from a different context will
not work properly, causing among other things, gdb breakpoints
to fail.

This patch adds a "pid" argument to _tlbie() on 4xx processors,
and uses it to flush entries in the right context. FSL BookE
also gets the argument but it seems they don't need it (their
tlbivax form ignores the PID when invalidating according to the
document I have).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2007-11-01 07:15:09 -05:00

397 lines
9.2 KiB
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/*
* arch/ppc/platforms/4xx/taishan.c
*
* AMCC Taishan board specific routines
*
* Copyright 2007 DENX Software Engineering, Stefan Roese <sr@denx.de>
*
* 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.
*/
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/types.h>
#include <linux/major.h>
#include <linux/blkdev.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/ide.h>
#include <linux/initrd.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/tty.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/platform_device.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/ndfc.h>
#include <linux/mtd/physmap.h>
#include <asm/machdep.h>
#include <asm/ocp.h>
#include <asm/bootinfo.h>
#include <asm/ppcboot.h>
#include <syslib/gen550.h>
#include <syslib/ibm440gx_common.h>
extern bd_t __res;
static struct ibm44x_clocks clocks __initdata;
/*
* NOR FLASH configuration (using mtd physmap driver)
*/
/* start will be added dynamically, end is always fixed */
static struct resource taishan_nor_resource = {
.start = TAISHAN_FLASH_ADDR,
.end = 0x1ffffffffULL,
.flags = IORESOURCE_MEM,
};
#define RW_PART0_OF 0
#define RW_PART0_SZ 0x180000
#define RW_PART1_SZ 0x200000
/* Partition 2 will be autosized dynamically... */
#define RW_PART3_SZ 0x80000
#define RW_PART4_SZ 0x40000
static struct mtd_partition taishan_nor_parts[] = {
{
.name = "kernel",
.offset = 0,
.size = RW_PART0_SZ
},
{
.name = "root",
.offset = MTDPART_OFS_APPEND,
.size = RW_PART1_SZ,
},
{
.name = "user",
.offset = MTDPART_OFS_APPEND,
/* .size = RW_PART2_SZ */ /* will be adjusted dynamically */
},
{
.name = "env",
.offset = MTDPART_OFS_APPEND,
.size = RW_PART3_SZ,
},
{
.name = "u-boot",
.offset = MTDPART_OFS_APPEND,
.size = RW_PART4_SZ,
}
};
static struct physmap_flash_data taishan_nor_data = {
.width = 4,
.parts = taishan_nor_parts,
.nr_parts = ARRAY_SIZE(taishan_nor_parts),
};
static struct platform_device taishan_nor_device = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &taishan_nor_data,
},
.num_resources = 1,
.resource = &taishan_nor_resource,
};
static int taishan_setup_flash(void)
{
/*
* Adjust partition 2 to flash size
*/
taishan_nor_parts[2].size = __res.bi_flashsize -
RW_PART0_SZ - RW_PART1_SZ - RW_PART3_SZ - RW_PART4_SZ;
platform_device_register(&taishan_nor_device);
return 0;
}
arch_initcall(taishan_setup_flash);
static void __init
taishan_calibrate_decr(void)
{
unsigned int freq;
if (mfspr(SPRN_CCR1) & CCR1_TCS)
freq = TAISHAN_TMR_CLK;
else
freq = clocks.cpu;
ibm44x_calibrate_decr(freq);
}
static int
taishan_show_cpuinfo(struct seq_file *m)
{
seq_printf(m, "vendor\t\t: AMCC\n");
seq_printf(m, "machine\t\t: PPC440GX EVB (Taishan)\n");
ibm440gx_show_cpuinfo(m);
return 0;
}
static inline int
taishan_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
static char pci_irq_table[][4] =
/*
* PCI IDSEL/INTPIN->INTLINE
* A B C D
*/
{
{ 23, 24, 25, 26 }, /* IDSEL 1 - PCI Slot 0 */
{ 24, 25, 26, 23 }, /* IDSEL 2 - PCI Slot 1 */
};
const long min_idsel = 1, max_idsel = 2, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
}
static void __init taishan_set_emacdata(void)
{
struct ocp_def *def;
struct ocp_func_emac_data *emacdata;
int i;
/* Set phy_map, phy_mode, and mac_addr for each EMAC */
for (i=2; i<4; i++) {
def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, i);
emacdata = def->additions;
if (i < 2) {
emacdata->phy_map = 0x00000001; /* Skip 0x00 */
emacdata->phy_mode = PHY_MODE_SMII;
} else {
emacdata->phy_map = 0x00000001; /* Skip 0x00 */
emacdata->phy_mode = PHY_MODE_RGMII;
}
if (i == 0)
memcpy(emacdata->mac_addr, "\0\0\0\0\0\0", 6);
else if (i == 1)
memcpy(emacdata->mac_addr, "\0\0\0\0\0\0", 6);
else if (i == 2)
memcpy(emacdata->mac_addr, __res.bi_enetaddr, 6);
else if (i == 3)
memcpy(emacdata->mac_addr, __res.bi_enet1addr, 6);
}
}
#define PCIX_READW(offset) \
(readw(pcix_reg_base+offset))
#define PCIX_WRITEW(value, offset) \
(writew(value, pcix_reg_base+offset))
#define PCIX_WRITEL(value, offset) \
(writel(value, pcix_reg_base+offset))
/*
* FIXME: This is only here to "make it work". This will move
* to a ibm_pcix.c which will contain a generic IBM PCIX bridge
* configuration library. -Matt
*/
static void __init
taishan_setup_pcix(void)
{
void *pcix_reg_base;
pcix_reg_base = ioremap64(PCIX0_REG_BASE, PCIX_REG_SIZE);
/* Enable PCIX0 I/O, Mem, and Busmaster cycles */
PCIX_WRITEW(PCIX_READW(PCIX0_COMMAND) | PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER, PCIX0_COMMAND);
/* Disable all windows */
PCIX_WRITEL(0, PCIX0_POM0SA);
PCIX_WRITEL(0, PCIX0_POM1SA);
PCIX_WRITEL(0, PCIX0_POM2SA);
PCIX_WRITEL(0, PCIX0_PIM0SA);
PCIX_WRITEL(0, PCIX0_PIM0SAH);
PCIX_WRITEL(0, PCIX0_PIM1SA);
PCIX_WRITEL(0, PCIX0_PIM2SA);
PCIX_WRITEL(0, PCIX0_PIM2SAH);
/* Setup 2GB PLB->PCI outbound mem window (3_8000_0000->0_8000_0000) */
PCIX_WRITEL(0x00000003, PCIX0_POM0LAH);
PCIX_WRITEL(0x80000000, PCIX0_POM0LAL);
PCIX_WRITEL(0x00000000, PCIX0_POM0PCIAH);
PCIX_WRITEL(0x80000000, PCIX0_POM0PCIAL);
PCIX_WRITEL(0x80000001, PCIX0_POM0SA);
/* Setup 2GB PCI->PLB inbound memory window at 0, enable MSIs */
PCIX_WRITEL(0x00000000, PCIX0_PIM0LAH);
PCIX_WRITEL(0x00000000, PCIX0_PIM0LAL);
PCIX_WRITEL(0x80000007, PCIX0_PIM0SA);
PCIX_WRITEL(0xffffffff, PCIX0_PIM0SAH);
iounmap(pcix_reg_base);
eieio();
}
static void __init
taishan_setup_hose(void)
{
struct pci_controller *hose;
/* Configure windows on the PCI-X host bridge */
taishan_setup_pcix();
hose = pcibios_alloc_controller();
if (!hose)
return;
hose->first_busno = 0;
hose->last_busno = 0xff;
hose->pci_mem_offset = TAISHAN_PCI_MEM_OFFSET;
pci_init_resource(&hose->io_resource,
TAISHAN_PCI_LOWER_IO,
TAISHAN_PCI_UPPER_IO,
IORESOURCE_IO,
"PCI host bridge");
pci_init_resource(&hose->mem_resources[0],
TAISHAN_PCI_LOWER_MEM,
TAISHAN_PCI_UPPER_MEM,
IORESOURCE_MEM,
"PCI host bridge");
hose->io_space.start = TAISHAN_PCI_LOWER_IO;
hose->io_space.end = TAISHAN_PCI_UPPER_IO;
hose->mem_space.start = TAISHAN_PCI_LOWER_MEM;
hose->mem_space.end = TAISHAN_PCI_UPPER_MEM;
hose->io_base_virt = ioremap64(TAISHAN_PCI_IO_BASE, TAISHAN_PCI_IO_SIZE);
isa_io_base = (unsigned long) hose->io_base_virt;
setup_indirect_pci(hose,
TAISHAN_PCI_CFGA_PLB32,
TAISHAN_PCI_CFGD_PLB32);
hose->set_cfg_type = 1;
hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
ppc_md.pci_swizzle = common_swizzle;
ppc_md.pci_map_irq = taishan_map_irq;
}
static void __init
taishan_early_serial_map(void)
{
struct uart_port port;
/* Setup ioremapped serial port access */
memset(&port, 0, sizeof(port));
port.membase = ioremap64(PPC440GX_UART0_ADDR, 8);
port.irq = UART0_INT;
port.uartclk = clocks.uart0;
port.regshift = 0;
port.iotype = UPIO_MEM;
port.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
port.line = 0;
if (early_serial_setup(&port) != 0)
printk("Early serial init of port 0 failed\n");
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
/* Configure debug serial access */
gen550_init(0, &port);
/* Purge TLB entry added in head_44x.S for early serial access */
_tlbie(UART0_IO_BASE, 0);
#endif
port.membase = ioremap64(PPC440GX_UART1_ADDR, 8);
port.irq = UART1_INT;
port.uartclk = clocks.uart1;
port.line = 1;
if (early_serial_setup(&port) != 0)
printk("Early serial init of port 1 failed\n");
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
/* Configure debug serial access */
gen550_init(1, &port);
#endif
}
static void __init
taishan_setup_arch(void)
{
taishan_set_emacdata();
ibm440gx_tah_enable();
/*
* Determine various clocks.
* To be completely correct we should get SysClk
* from FPGA, because it can be changed by on-board switches
* --ebs
*/
ibm440gx_get_clocks(&clocks, 33333333, 6 * 1843200);
ocp_sys_info.opb_bus_freq = clocks.opb;
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000/HZ;
/* Setup PCI host bridge */
taishan_setup_hose();
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start)
ROOT_DEV = Root_RAM0;
else
#endif
#ifdef CONFIG_ROOT_NFS
ROOT_DEV = Root_NFS;
#else
ROOT_DEV = Root_HDA1;
#endif
taishan_early_serial_map();
/* Identify the system */
printk("AMCC PowerPC 440GX Taishan Platform\n");
}
static void __init taishan_init(void)
{
ibm440gx_l2c_setup(&clocks);
}
void __init platform_init(unsigned long r3, unsigned long r4,
unsigned long r5, unsigned long r6, unsigned long r7)
{
ibm44x_platform_init(r3, r4, r5, r6, r7);
ppc_md.setup_arch = taishan_setup_arch;
ppc_md.show_cpuinfo = taishan_show_cpuinfo;
ppc_md.get_irq = NULL; /* Set in ppc4xx_pic_init() */
ppc_md.calibrate_decr = taishan_calibrate_decr;
#ifdef CONFIG_KGDB
ppc_md.early_serial_map = taishan_early_serial_map;
#endif
ppc_md.init = taishan_init;
}
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