projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| ea49f8ff PDM |
1 | /***************************************************************************/ |
| 2 | ||
| 3 | /* | |
| 5b2e6555 | 4 | * linux/arch/m68knommu/platform/54xx/config.c |
| ea49f8ff PDM |
5 | * |
| 6 | * Copyright (C) 2010, Philippe De Muyter <phdm@macqel.be> | |
| 7 | */ | |
| 8 | ||
| 9 | /***************************************************************************/ | |
| 10 | ||
| 11 | #include <linux/kernel.h> | |
| 12 | #include <linux/param.h> | |
| 13 | #include <linux/init.h> | |
| 14 | #include <linux/interrupt.h> | |
| 15 | #include <linux/io.h> | |
| 88be3515 GU |
16 | #include <linux/mm.h> |
| 17 | #include <linux/bootmem.h> | |
| 18 | #include <asm/pgalloc.h> | |
| ea49f8ff PDM |
19 | #include <asm/machdep.h> |
| 20 | #include <asm/coldfire.h> | |
| 5b2e6555 | 21 | #include <asm/m54xxsim.h> |
| ea49f8ff | 22 | #include <asm/mcfuart.h> |
| 5b2e6555 | 23 | #include <asm/m54xxgpt.h> |
| 88be3515 GU |
24 | #ifdef CONFIG_MMU |
| 25 | #include <asm/mmu_context.h> | |
| 26 | #endif | |
| ea49f8ff | 27 | |
| ea49f8ff PDM |
28 | /***************************************************************************/ |
| 29 | ||
| 5b2e6555 | 30 | static void __init m54xx_uarts_init(void) |
| ea49f8ff | 31 | { |
| b9a0c3f8 GU |
32 | /* enable io pins */ |
| 33 | __raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD, | |
| 34 | MCF_MBAR + MCF_PAR_PSC(0)); | |
| 35 | __raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD | MCF_PAR_PSC_RTS_RTS, | |
| 36 | MCF_MBAR + MCF_PAR_PSC(1)); | |
| 37 | __raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD | MCF_PAR_PSC_RTS_RTS | | |
| 38 | MCF_PAR_PSC_CTS_CTS, MCF_MBAR + MCF_PAR_PSC(2)); | |
| 39 | __raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD, | |
| 40 | MCF_MBAR + MCF_PAR_PSC(3)); | |
| ea49f8ff PDM |
41 | } |
| 42 | ||
| 43 | /***************************************************************************/ | |
| 44 | ||
| 5b2e6555 | 45 | static void mcf54xx_reset(void) |
| ea49f8ff PDM |
46 | { |
| 47 | /* disable interrupts and enable the watchdog */ | |
| 48 | asm("movew #0x2700, %sr\n"); | |
| 49 | __raw_writel(0, MCF_MBAR + MCF_GPT_GMS0); | |
| 50 | __raw_writel(MCF_GPT_GCIR_CNT(1), MCF_MBAR + MCF_GPT_GCIR0); | |
| 51 | __raw_writel(MCF_GPT_GMS_WDEN | MCF_GPT_GMS_CE | MCF_GPT_GMS_TMS(4), | |
| 52 | MCF_MBAR + MCF_GPT_GMS0); | |
| 53 | } | |
| 54 | ||
| 55 | /***************************************************************************/ | |
| 56 | ||
| 88be3515 GU |
57 | #ifdef CONFIG_MMU |
| 58 | ||
| 59 | unsigned long num_pages; | |
| 60 | ||
| 61 | static void __init mcf54xx_bootmem_alloc(void) | |
| 62 | { | |
| 63 | unsigned long start_pfn; | |
| 64 | unsigned long memstart; | |
| 65 | ||
| 66 | /* _rambase and _ramend will be naturally page aligned */ | |
| 67 | m68k_memory[0].addr = _rambase; | |
| 68 | m68k_memory[0].size = _ramend - _rambase; | |
| 69 | ||
| 70 | /* compute total pages in system */ | |
| 71 | num_pages = (_ramend - _rambase) >> PAGE_SHIFT; | |
| 72 | ||
| 73 | /* page numbers */ | |
| 74 | memstart = PAGE_ALIGN(_ramstart); | |
| 75 | min_low_pfn = _rambase >> PAGE_SHIFT; | |
| 76 | start_pfn = memstart >> PAGE_SHIFT; | |
| 77 | max_low_pfn = _ramend >> PAGE_SHIFT; | |
| 78 | high_memory = (void *)_ramend; | |
| 79 | ||
| 80 | m68k_virt_to_node_shift = fls(_ramend - _rambase - 1) - 6; | |
| 81 | module_fixup(NULL, __start_fixup, __stop_fixup); | |
| 82 | ||
| 83 | /* setup bootmem data */ | |
| 84 | m68k_setup_node(0); | |
| 85 | memstart += init_bootmem_node(NODE_DATA(0), start_pfn, | |
| 86 | min_low_pfn, max_low_pfn); | |
| 87 | free_bootmem_node(NODE_DATA(0), memstart, _ramend - memstart); | |
| 88 | } | |
| 89 | ||
| 90 | #endif /* CONFIG_MMU */ | |
| 91 | ||
| 92 | /***************************************************************************/ | |
| 93 | ||
| ea49f8ff PDM |
94 | void __init config_BSP(char *commandp, int size) |
| 95 | { | |
| 88be3515 GU |
96 | #ifdef CONFIG_MMU |
| 97 | mcf54xx_bootmem_alloc(); | |
| 98 | mmu_context_init(); | |
| 99 | #endif | |
| 5b2e6555 | 100 | mach_reset = mcf54xx_reset; |
| 35aefb26 | 101 | mach_sched_init = hw_timer_init; |
| 5b2e6555 | 102 | m54xx_uarts_init(); |
| ea49f8ff PDM |
103 | } |
| 104 | ||
| 105 | /***************************************************************************/ |