147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
/*
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* arch/ppc/platforms/4xx/xilinx_ml300.c
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*
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* Xilinx ML300 evaluation board initialization
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*
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* Author: MontaVista Software, Inc.
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* source@mvista.com
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*
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* 2002-2004 (c) MontaVista Software, Inc. This file is licensed under the
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* terms of the GNU General Public License version 2. This program is licensed
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* "as is" without any warranty of any kind, whether express or implied.
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*/
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#include <linux/config.h>
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#include <linux/init.h>
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#include <linux/irq.h>
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#include <linux/tty.h>
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#include <linux/serial.h>
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#include <linux/serial_core.h>
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#include <linux/serialP.h>
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#include <asm/io.h>
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#include <asm/machdep.h>
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#include <asm/ocp.h>
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#include <platforms/4xx/virtex-ii_pro.h> /* for NR_SER_PORTS */
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/*
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* As an overview of how the following functions (platform_init,
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* ml300_map_io, ml300_setup_arch and ml300_init_IRQ) fit into the
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* kernel startup procedure, here's a call tree:
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*
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* start_here arch/ppc/kernel/head_4xx.S
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* early_init arch/ppc/kernel/setup.c
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* machine_init arch/ppc/kernel/setup.c
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* platform_init this file
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* ppc4xx_init arch/ppc/syslib/ppc4xx_setup.c
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* parse_bootinfo
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* find_bootinfo
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* "setup some default ppc_md pointers"
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* MMU_init arch/ppc/mm/init.c
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* *ppc_md.setup_io_mappings == ml300_map_io this file
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* ppc4xx_map_io arch/ppc/syslib/ppc4xx_setup.c
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* start_kernel init/main.c
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* setup_arch arch/ppc/kernel/setup.c
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* #if defined(CONFIG_KGDB)
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* *ppc_md.kgdb_map_scc() == gen550_kgdb_map_scc
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* #endif
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* *ppc_md.setup_arch == ml300_setup_arch this file
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* ppc4xx_setup_arch arch/ppc/syslib/ppc4xx_setup.c
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* ppc4xx_find_bridges arch/ppc/syslib/ppc405_pci.c
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* init_IRQ arch/ppc/kernel/irq.c
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* *ppc_md.init_IRQ == ml300_init_IRQ this file
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* ppc4xx_init_IRQ arch/ppc/syslib/ppc4xx_setup.c
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* ppc4xx_pic_init arch/ppc/syslib/xilinx_pic.c
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*/
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#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
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static volatile unsigned *powerdown_base =
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(volatile unsigned *) XPAR_POWER_0_POWERDOWN_BASEADDR;
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static void
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xilinx_power_off(void)
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{
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local_irq_disable();
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out_be32(powerdown_base, XPAR_POWER_0_POWERDOWN_VALUE);
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while (1) ;
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}
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#endif
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void __init
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ml300_map_io(void)
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{
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ppc4xx_map_io();
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#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
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powerdown_base = ioremap((unsigned long) powerdown_base,
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XPAR_POWER_0_POWERDOWN_HIGHADDR -
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XPAR_POWER_0_POWERDOWN_BASEADDR + 1);
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#endif
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}
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static void __init
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ml300_early_serial_map(void)
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{
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#ifdef CONFIG_SERIAL_8250
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struct serial_state old_ports[] = { SERIAL_PORT_DFNS };
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struct uart_port port;
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int i;
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/* Setup ioremapped serial port access */
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for (i = 0; i < ARRAY_SIZE(old_ports); i++ ) {
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memset(&port, 0, sizeof(port));
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port.membase = ioremap((phys_addr_t)(old_ports[i].iomem_base), 16);
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port.irq = old_ports[i].irq;
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port.uartclk = old_ports[i].baud_base * 16;
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port.regshift = old_ports[i].iomem_reg_shift;
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port.iotype = SERIAL_IO_MEM;
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port.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
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port.line = i;
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if (early_serial_setup(&port) != 0) {
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printk("Early serial init of port %d failed\n", i);
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}
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}
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#endif /* CONFIG_SERIAL_8250 */
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}
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void __init
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ml300_setup_arch(void)
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{
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ppc4xx_setup_arch(); /* calls ppc4xx_find_bridges() */
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ml300_early_serial_map();
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/* Identify the system */
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printk(KERN_INFO "Xilinx Virtex-II Pro port\n");
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printk(KERN_INFO "Port by MontaVista Software, Inc. (source@mvista.com)\n");
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}
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/* Called after board_setup_irq from ppc4xx_init_IRQ(). */
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void __init
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ml300_init_irq(void)
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{
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ppc4xx_init_IRQ();
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}
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void __init
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platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7)
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{
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ppc4xx_init(r3, r4, r5, r6, r7);
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ppc_md.setup_arch = ml300_setup_arch;
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ppc_md.setup_io_mappings = ml300_map_io;
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ppc_md.init_IRQ = ml300_init_irq;
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#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
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ppc_md.power_off = xilinx_power_off;
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#endif
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#ifdef CONFIG_KGDB
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ppc_md.early_serial_map = ml300_early_serial_map;
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#endif
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}
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