1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (C) 2018 Hangzhou C-SKY Microsyst !! 2 #ifdef CONFIG_MMU
3 !! 3 #include "setup_mm.c"
4 #include <linux/console.h> !! 4 #else
5 #include <linux/memblock.h> !! 5 #include "setup_no.c"
6 #include <linux/initrd.h> <<
7 #include <linux/of.h> <<
8 #include <linux/of_fdt.h> <<
9 #include <linux/start_kernel.h> <<
10 #include <linux/dma-map-ops.h> <<
11 #include <asm/sections.h> <<
12 #include <asm/mmu_context.h> <<
13 #include <asm/pgalloc.h> <<
14 <<
15 static void __init csky_memblock_init(void) <<
16 { <<
17 unsigned long lowmem_size = PFN_DOWN(L <<
18 unsigned long sseg_size = PFN_DOWN(SSE <<
19 unsigned long max_zone_pfn[MAX_NR_ZONE <<
20 signed long size; <<
21 <<
22 memblock_reserve(__pa(_start), _end - <<
23 <<
24 early_init_fdt_reserve_self(); <<
25 early_init_fdt_scan_reserved_mem(); <<
26 <<
27 memblock_dump_all(); <<
28 <<
29 min_low_pfn = PFN_UP(memblock_start_of <<
30 max_low_pfn = max_pfn = PFN_DOWN(membl <<
31 <<
32 size = max_pfn - min_low_pfn; <<
33 <<
34 if (size >= lowmem_size) { <<
35 max_low_pfn = min_low_pfn + lo <<
36 #ifdef CONFIG_PAGE_OFFSET_80000000 <<
37 write_mmu_msa1(read_mmu_msa0() <<
38 #endif 6 #endif
39 } else if (size > sseg_size) { <<
40 max_low_pfn = min_low_pfn + ss <<
41 } <<
42 <<
43 max_zone_pfn[ZONE_NORMAL] = max_low_pf <<
44 <<
45 mmu_init(min_low_pfn, max_low_pfn); <<
46 7
47 #ifdef CONFIG_HIGHMEM !! 8 #if IS_ENABLED(CONFIG_INPUT_M68K_BEEP)
48 max_zone_pfn[ZONE_HIGHMEM] = max_pfn; !! 9 void (*mach_beep)(unsigned int, unsigned int);
49 !! 10 EXPORT_SYMBOL(mach_beep);
50 highstart_pfn = max_low_pfn; <<
51 highend_pfn = max_pfn; <<
52 #endif 11 #endif
53 memblock_set_current_limit(PFN_PHYS(ma <<
54 <<
55 dma_contiguous_reserve(0); <<
56 <<
57 free_area_init(max_zone_pfn); <<
58 } <<
59 <<
60 void __init setup_arch(char **cmdline_p) <<
61 { <<
62 *cmdline_p = boot_command_line; <<
63 <<
64 console_verbose(); <<
65 <<
66 pr_info("Phys. mem: %ldMB\n", <<
67 (unsigned long) memblock_phys_ <<
68 <<
69 setup_initial_init_mm(_start, _etext, <<
70 <<
71 parse_early_param(); <<
72 <<
73 csky_memblock_init(); <<
74 <<
75 unflatten_and_copy_device_tree(); <<
76 <<
77 #ifdef CONFIG_SMP <<
78 setup_smp(); <<
79 #endif <<
80 <<
81 sparse_init(); <<
82 <<
83 fixaddr_init(); <<
84 <<
85 #ifdef CONFIG_HIGHMEM <<
86 kmap_init(); <<
87 #endif <<
88 } <<
89 <<
90 unsigned long va_pa_offset; <<
91 EXPORT_SYMBOL(va_pa_offset); <<
92 <<
93 static inline unsigned long read_mmu_msa(void) <<
94 { <<
95 #ifdef CONFIG_PAGE_OFFSET_80000000 <<
96 return read_mmu_msa0(); <<
97 #endif <<
98 <<
99 #ifdef CONFIG_PAGE_OFFSET_A0000000 <<
100 return read_mmu_msa1(); <<
101 #endif <<
102 } <<
103 <<
104 asmlinkage __visible void __init csky_start(un <<
105 vo <<
106 { <<
107 /* Clean up bss section */ <<
108 memset(__bss_start, 0, __bss_stop - __ <<
109 <<
110 va_pa_offset = read_mmu_msa() & ~(SSEG <<
111 <<
112 pre_trap_init(); <<
113 <<
114 if (dtb_start == NULL) <<
115 early_init_dt_scan(__dtb_start <<
116 else <<
117 early_init_dt_scan(dtb_start); <<
118 <<
119 start_kernel(); <<
120 <<
121 asm volatile("br .\n"); <<
122 } <<
123 12
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