diff options
Diffstat (limited to 'arch/arm/mach-highbank/highbank.c')
| -rw-r--r-- | arch/arm/mach-highbank/highbank.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/arch/arm/mach-highbank/highbank.c b/arch/arm/mach-highbank/highbank.c new file mode 100644 index 0000000..88660d5 --- /dev/null +++ b/arch/arm/mach-highbank/highbank.c @@ -0,0 +1,149 @@ +/* + * Copyright 2010-2011 Calxeda, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>. + */ +#include <linux/clk.h> +#include <linux/clkdev.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/of_platform.h> +#include <linux/of_address.h> +#include <linux/smp.h> + +#include <asm/cacheflush.h> +#include <asm/unified.h> +#include <asm/smp_scu.h> +#include <asm/hardware/arm_timer.h> +#include <asm/hardware/timer-sp.h> +#include <asm/hardware/gic.h> +#include <asm/hardware/cache-l2x0.h> +#include <asm/mach/arch.h> +#include <asm/mach/map.h> +#include <asm/mach/time.h> +#include <mach/irqs.h> + +#include "core.h" +#include "sysregs.h" + +void __iomem *sregs_base; + +#define HB_SCU_VIRT_BASE 0xfee00000 +void __iomem *scu_base_addr = ((void __iomem *)(HB_SCU_VIRT_BASE)); + +static struct map_desc scu_io_desc __initdata = { + .virtual = HB_SCU_VIRT_BASE, + .pfn = 0, /* run-time */ + .length = SZ_4K, + .type = MT_DEVICE, +}; + +static void __init highbank_scu_map_io(void) +{ + unsigned long base; + + /* Get SCU base */ + asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base)); + + scu_io_desc.pfn = __phys_to_pfn(base); + iotable_init(&scu_io_desc, 1); +} + +static void __init highbank_map_io(void) +{ + highbank_scu_map_io(); + highbank_lluart_map_io(); +} + +#define HB_JUMP_TABLE_PHYS(cpu) (0x40 + (0x10 * (cpu))) +#define HB_JUMP_TABLE_VIRT(cpu) phys_to_virt(HB_JUMP_TABLE_PHYS(cpu)) + +void highbank_set_cpu_jump(int cpu, void *jump_addr) +{ +#ifdef CONFIG_SMP + cpu = cpu_logical_map(cpu); +#endif + writel(BSYM(virt_to_phys(jump_addr)), HB_JUMP_TABLE_VIRT(cpu)); + __cpuc_flush_dcache_area(HB_JUMP_TABLE_VIRT(cpu), 16); + outer_clean_range(HB_JUMP_TABLE_PHYS(cpu), + HB_JUMP_TABLE_PHYS(cpu) + 15); +} + +const static struct of_device_id irq_match[] = { + { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, }, + {} +}; + +static void __init highbank_init_irq(void) +{ + of_irq_init(irq_match); + l2x0_of_init(0, ~0UL); +} + +static void __init highbank_timer_init(void) +{ + int irq; + struct device_node *np; + void __iomem *timer_base; + + /* Map system registers */ + np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs"); + sregs_base = of_iomap(np, 0); + WARN_ON(!sregs_base); + + np = of_find_compatible_node(NULL, NULL, "arm,sp804"); + timer_base = of_iomap(np, 0); + WARN_ON(!timer_base); + irq = irq_of_parse_and_map(np, 0); + + highbank_clocks_init(); + + sp804_clocksource_init(timer_base + 0x20, "timer1"); + sp804_clockevents_init(timer_base, irq, "timer0"); +} + +static struct sys_timer highbank_timer = { + .init = highbank_timer_init, +}; + +static void highbank_power_off(void) +{ + hignbank_set_pwr_shutdown(); + scu_power_mode(scu_base_addr, SCU_PM_POWEROFF); + + while (1) + cpu_do_idle(); +} + +static void __init highbank_init(void) +{ + pm_power_off = highbank_power_off; + + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); +} + +static const char *highbank_match[] __initconst = { + "calxeda,highbank", + NULL, +}; + +DT_MACHINE_START(HIGHBANK, "Highbank") + .map_io = highbank_map_io, + .init_irq = highbank_init_irq, + .timer = &highbank_timer, + .init_machine = highbank_init, + .dt_compat = highbank_match, +MACHINE_END |