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android_kernel_xiaomi_sm8350/arch/ppc/platforms/85xx/sbc8560.c
Kumar Gala 252fcaed48 [PATCH] ppc32: Fix some minor issues related to FSL Book-E KGDB support 
Some debug registers needed to be initialized early on to allow proper
support for KGDB.  Additionally, we need to setup the
ppc.md_early_serial_map function pointer on boards that have serial support
for KGDB.

Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-28 16:46:15 -07:00

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6.2 KiB
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/*
* arch/ppc/platforms/85xx/sbc8560.c
*
* Wind River SBC8560 board specific routines
*
* Maintainer: Kumar Gala <kumar.gala@freescale.com>
*
* Copyright 2004 Freescale Semiconductor Inc.
*
* 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/config.h>
#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/major.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/serial.h>
#include <linux/tty.h> /* for linux/serial_core.h */
#include <linux/serial_core.h>
#include <linux/initrd.h>
#include <linux/module.h>
#include <linux/fsl_devices.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/atomic.h>
#include <asm/time.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/prom.h>
#include <asm/open_pic.h>
#include <asm/bootinfo.h>
#include <asm/pci-bridge.h>
#include <asm/mpc85xx.h>
#include <asm/irq.h>
#include <asm/immap_85xx.h>
#include <asm/kgdb.h>
#include <asm/ppc_sys.h>
#include <mm/mmu_decl.h>
#include <syslib/ppc85xx_common.h>
#include <syslib/ppc85xx_setup.h>
#ifdef CONFIG_SERIAL_8250
static void __init
sbc8560_early_serial_map(void)
{
struct uart_port uart_req;
/* Setup serial port access */
memset(&uart_req, 0, sizeof (uart_req));
uart_req.irq = MPC85xx_IRQ_EXT9;
uart_req.flags = STD_COM_FLAGS;
uart_req.uartclk = BASE_BAUD * 16;
uart_req.iotype = SERIAL_IO_MEM;
uart_req.mapbase = UARTA_ADDR;
uart_req.membase = ioremap(uart_req.mapbase, MPC85xx_UART0_SIZE);
uart_req.type = PORT_16650;
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
gen550_init(0, &uart_req);
#endif
if (early_serial_setup(&uart_req) != 0)
printk("Early serial init of port 0 failed\n");
/* Assume early_serial_setup() doesn't modify uart_req */
uart_req.line = 1;
uart_req.mapbase = UARTB_ADDR;
uart_req.membase = ioremap(uart_req.mapbase, MPC85xx_UART1_SIZE);
uart_req.irq = MPC85xx_IRQ_EXT10;
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
gen550_init(1, &uart_req);
#endif
if (early_serial_setup(&uart_req) != 0)
printk("Early serial init of port 1 failed\n");
}
#endif
/* ************************************************************************
*
* Setup the architecture
*
*/
static void __init
sbc8560_setup_arch(void)
{
bd_t *binfo = (bd_t *) __res;
unsigned int freq;
struct gianfar_platform_data *pdata;
/* get the core frequency */
freq = binfo->bi_intfreq;
if (ppc_md.progress)
ppc_md.progress("sbc8560_setup_arch()", 0);
/* Set loops_per_jiffy to a half-way reasonable value,
for use until calibrate_delay gets called. */
loops_per_jiffy = freq / HZ;
#ifdef CONFIG_PCI
/* setup PCI host bridges */
mpc85xx_setup_hose();
#endif
#ifdef CONFIG_SERIAL_8250
sbc8560_early_serial_map();
#endif
#ifdef CONFIG_SERIAL_TEXT_DEBUG
/* Invalidate the entry we stole earlier the serial ports
* should be properly mapped */
invalidate_tlbcam_entry(NUM_TLBCAMS - 1);
#endif
/* setup the board related information for the enet controllers */
pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC1);
pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
pdata->interruptPHY = MPC85xx_IRQ_EXT6;
pdata->phyid = 25;
/* fixup phy address */
pdata->phy_reg_addr += binfo->bi_immr_base;
memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC2);
pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
pdata->interruptPHY = MPC85xx_IRQ_EXT7;
pdata->phyid = 26;
/* fixup phy address */
pdata->phy_reg_addr += binfo->bi_immr_base;
memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
#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
}
/* ************************************************************************ */
void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
/* parse_bootinfo must always be called first */
parse_bootinfo(find_bootinfo());
/*
* If we were passed in a board information, copy it into the
* residual data area.
*/
if (r3) {
memcpy((void *) __res, (void *) (r3 + KERNELBASE),
sizeof (bd_t));
}
#ifdef CONFIG_SERIAL_TEXT_DEBUG
/* Use the last TLB entry to map CCSRBAR to allow access to DUART regs */
settlbcam(NUM_TLBCAMS - 1, UARTA_ADDR,
UARTA_ADDR, 0x1000, _PAGE_IO, 0);
#endif
#if defined(CONFIG_BLK_DEV_INITRD)
/*
* If the init RAM disk has been configured in, and there's a valid
* starting address for it, set it up.
*/
if (r4) {
initrd_start = r4 + KERNELBASE;
initrd_end = r5 + KERNELBASE;
}
#endif /* CONFIG_BLK_DEV_INITRD */
/* Copy the kernel command line arguments to a safe place. */
if (r6) {
*(char *) (r7 + KERNELBASE) = 0;
strcpy(cmd_line, (char *) (r6 + KERNELBASE));
}
identify_ppc_sys_by_id(mfspr(SPRN_SVR));
/* setup the PowerPC module struct */
ppc_md.setup_arch = sbc8560_setup_arch;
ppc_md.show_cpuinfo = sbc8560_show_cpuinfo;
ppc_md.init_IRQ = sbc8560_init_IRQ;
ppc_md.get_irq = openpic_get_irq;
ppc_md.restart = mpc85xx_restart;
ppc_md.power_off = mpc85xx_power_off;
ppc_md.halt = mpc85xx_halt;
ppc_md.find_end_of_memory = mpc85xx_find_end_of_memory;
ppc_md.time_init = NULL;
ppc_md.set_rtc_time = NULL;
ppc_md.get_rtc_time = NULL;
ppc_md.calibrate_decr = mpc85xx_calibrate_decr;
#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_SERIAL_TEXT_DEBUG)
ppc_md.progress = gen550_progress;
#endif /* CONFIG_SERIAL_8250 && CONFIG_SERIAL_TEXT_DEBUG */
#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_KGDB)
ppc_md.early_serial_map = sbc8560_early_serial_map;
#endif /* CONFIG_SERIAL_8250 && CONFIG_KGDB */
if (ppc_md.progress)
ppc_md.progress("sbc8560_init(): exit", 0);
}
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