diff options
Diffstat (limited to 'arch/ppc/platforms/4xx/xilinx_ml300.c')
| -rw-r--r-- | arch/ppc/platforms/4xx/xilinx_ml300.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/arch/ppc/platforms/4xx/xilinx_ml300.c b/arch/ppc/platforms/4xx/xilinx_ml300.c new file mode 100644 index 000000000000..0b1b77d986bf --- /dev/null +++ b/arch/ppc/platforms/4xx/xilinx_ml300.c @@ -0,0 +1,146 @@ +/* + * arch/ppc/platforms/4xx/xilinx_ml300.c + * + * Xilinx ML300 evaluation board initialization + * + * Author: MontaVista Software, Inc. + * source@mvista.com + * + * 2002-2004 (c) MontaVista Software, Inc. This file is licensed under the + * terms of the GNU General Public License version 2. This program is licensed + * "as is" without any warranty of any kind, whether express or implied. + */ + +#include <linux/config.h> +#include <linux/init.h> +#include <linux/irq.h> +#include <linux/tty.h> +#include <linux/serial.h> +#include <linux/serial_core.h> +#include <linux/serialP.h> +#include <asm/io.h> +#include <asm/machdep.h> +#include <asm/ocp.h> + +#include <platforms/4xx/virtex-ii_pro.h> /* for NR_SER_PORTS */ + +/* + * As an overview of how the following functions (platform_init, + * ml300_map_io, ml300_setup_arch and ml300_init_IRQ) fit into the + * kernel startup procedure, here's a call tree: + * + * start_here arch/ppc/kernel/head_4xx.S + * early_init arch/ppc/kernel/setup.c + * machine_init arch/ppc/kernel/setup.c + * platform_init this file + * ppc4xx_init arch/ppc/syslib/ppc4xx_setup.c + * parse_bootinfo + * find_bootinfo + * "setup some default ppc_md pointers" + * MMU_init arch/ppc/mm/init.c + * *ppc_md.setup_io_mappings == ml300_map_io this file + * ppc4xx_map_io arch/ppc/syslib/ppc4xx_setup.c + * start_kernel init/main.c + * setup_arch arch/ppc/kernel/setup.c + * #if defined(CONFIG_KGDB) + * *ppc_md.kgdb_map_scc() == gen550_kgdb_map_scc + * #endif + * *ppc_md.setup_arch == ml300_setup_arch this file + * ppc4xx_setup_arch arch/ppc/syslib/ppc4xx_setup.c + * ppc4xx_find_bridges arch/ppc/syslib/ppc405_pci.c + * init_IRQ arch/ppc/kernel/irq.c + * *ppc_md.init_IRQ == ml300_init_IRQ this file + * ppc4xx_init_IRQ arch/ppc/syslib/ppc4xx_setup.c + * ppc4xx_pic_init arch/ppc/syslib/xilinx_pic.c + */ + +#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR) + +static volatile unsigned *powerdown_base = + (volatile unsigned *) XPAR_POWER_0_POWERDOWN_BASEADDR; + +static void +xilinx_power_off(void) +{ + local_irq_disable(); + out_be32(powerdown_base, XPAR_POWER_0_POWERDOWN_VALUE); + while (1) ; +} +#endif + +void __init +ml300_map_io(void) +{ + ppc4xx_map_io(); + +#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR) + powerdown_base = ioremap((unsigned long) powerdown_base, + XPAR_POWER_0_POWERDOWN_HIGHADDR - + XPAR_POWER_0_POWERDOWN_BASEADDR + 1); +#endif +} + +static void __init +ml300_early_serial_map(void) +{ +#ifdef CONFIG_SERIAL_8250 + struct serial_state old_ports[] = { SERIAL_PORT_DFNS }; + struct uart_port port; + int i; + + /* Setup ioremapped serial port access */ + for (i = 0; i < ARRAY_SIZE(old_ports); i++ ) { + memset(&port, 0, sizeof(port)); + port.membase = ioremap((phys_addr_t)(old_ports[i].iomem_base), 16); + port.irq = old_ports[i].irq; + port.uartclk = old_ports[i].baud_base * 16; + port.regshift = old_ports[i].iomem_reg_shift; + port.iotype = SERIAL_IO_MEM; + port.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST; + port.line = i; + + if (early_serial_setup(&port) != 0) { + printk("Early serial init of port %d failed\n", i); + } + } +#endif /* CONFIG_SERIAL_8250 */ +} + +void __init +ml300_setup_arch(void) +{ + ppc4xx_setup_arch(); /* calls ppc4xx_find_bridges() */ + + ml300_early_serial_map(); + + /* Identify the system */ + printk(KERN_INFO "Xilinx Virtex-II Pro port\n"); + printk(KERN_INFO "Port by MontaVista Software, Inc. (source@mvista.com)\n"); +} + +/* Called after board_setup_irq from ppc4xx_init_IRQ(). */ +void __init +ml300_init_irq(void) +{ + ppc4xx_init_IRQ(); +} + +void __init +platform_init(unsigned long r3, unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7) +{ + ppc4xx_init(r3, r4, r5, r6, r7); + + ppc_md.setup_arch = ml300_setup_arch; + ppc_md.setup_io_mappings = ml300_map_io; + ppc_md.init_IRQ = ml300_init_irq; + +#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR) + ppc_md.power_off = xilinx_power_off; +#endif + +#ifdef CONFIG_KGDB + ppc_md.early_serial_map = ml300_early_serial_map; +#endif +} + |