1 // SPDX-License-Identifier: GPL-2.0
3 * linux/arch/m32r/mm/discontig.c
5 * Discontig memory support
7 * Copyright (c) 2003 Hitoshi Yamamoto
11 #include <linux/bootmem.h>
12 #include <linux/mmzone.h>
13 #include <linux/initrd.h>
14 #include <linux/nodemask.h>
15 #include <linux/module.h>
16 #include <linux/pfn.h>
18 #include <asm/setup.h>
22 struct pglist_data *node_data[MAX_NUMNODES];
23 EXPORT_SYMBOL(node_data);
25 pg_data_t m32r_node_data[MAX_NUMNODES];
29 unsigned long start_pfn;
32 unsigned long free_pfn;
34 static mem_prof_t mem_prof[MAX_NUMNODES];
36 extern unsigned long memory_start;
37 extern unsigned long memory_end;
39 static void __init mem_prof_init(void)
41 unsigned long start_pfn, holes, free_pfn;
42 const unsigned long zone_alignment = 1UL << (MAX_ORDER - 1);
48 mp->start_pfn = PFN_UP(CONFIG_MEMORY_START);
49 mp->pages = PFN_DOWN(memory_end - memory_start);
51 mp->free_pfn = PFN_UP(__pa(_end));
53 /* Node#1 internal SRAM */
55 start_pfn = free_pfn = PFN_UP(CONFIG_IRAM_START);
57 if (start_pfn & (zone_alignment - 1)) {
59 while (start_pfn >= ul)
62 start_pfn = ul - zone_alignment;
63 holes = free_pfn - start_pfn;
66 mp->start_pfn = start_pfn;
67 mp->pages = PFN_DOWN(CONFIG_IRAM_SIZE) + holes;
69 mp->free_pfn = PFN_UP(CONFIG_IRAM_START);
72 unsigned long __init setup_memory(void)
74 unsigned long bootmap_size;
75 unsigned long min_pfn;
84 for_each_online_node(nid) {
86 NODE_DATA(nid)=(pg_data_t *)&m32r_node_data[nid];
87 NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
88 min_pfn = mp->start_pfn;
89 max_pfn = mp->start_pfn + mp->pages;
90 bootmap_size = init_bootmem_node(NODE_DATA(nid), mp->free_pfn,
91 mp->start_pfn, max_pfn);
93 free_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
96 reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
97 PFN_PHYS(mp->free_pfn - mp->start_pfn) + bootmap_size,
100 if (max_low_pfn < max_pfn)
101 max_low_pfn = max_pfn;
103 if (min_low_pfn > min_pfn)
104 min_low_pfn = min_pfn;
107 #ifdef CONFIG_BLK_DEV_INITRD
108 if (LOADER_TYPE && INITRD_START) {
109 if (INITRD_START + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
110 reserve_bootmem_node(NODE_DATA(0), INITRD_START,
111 INITRD_SIZE, BOOTMEM_DEFAULT);
112 initrd_start = INITRD_START + PAGE_OFFSET;
113 initrd_end = initrd_start + INITRD_SIZE;
114 printk("initrd:start[%08lx],size[%08lx]\n",
115 initrd_start, INITRD_SIZE);
117 printk("initrd extends beyond end of memory "
118 "(0x%08lx > 0x%08llx)\ndisabling initrd\n",
119 INITRD_START + INITRD_SIZE,
120 (unsigned long long)PFN_PHYS(max_low_pfn));
125 #endif /* CONFIG_BLK_DEV_INITRD */
130 #define START_PFN(nid) (NODE_DATA(nid)->bdata->node_min_pfn)
131 #define MAX_LOW_PFN(nid) (NODE_DATA(nid)->bdata->node_low_pfn)
133 void __init zone_sizes_init(void)
135 unsigned long zones_size[MAX_NR_ZONES], zholes_size[MAX_NR_ZONES];
136 unsigned long low, start_pfn;
140 for_each_online_node(nid) {
142 for (i = 0 ; i < MAX_NR_ZONES ; i++) {
146 start_pfn = START_PFN(nid);
147 low = MAX_LOW_PFN(nid);
148 zones_size[ZONE_DMA] = low - start_pfn;
149 zholes_size[ZONE_DMA] = mp->holes;
151 node_set_state(nid, N_NORMAL_MEMORY);
152 free_area_init_node(nid, zones_size, start_pfn, zholes_size);
157 * Use all area of internal RAM.
158 * see __alloc_pages()
160 NODE_DATA(1)->node_zones->watermark[WMARK_MIN] = 0;
161 NODE_DATA(1)->node_zones->watermark[WMARK_LOW] = 0;
162 NODE_DATA(1)->node_zones->watermark[WMARK_HIGH] = 0;