m68k/atari/stram.c

2  * Functions for ST-RAM allocations
4  * Copyright 1994-97 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
35  * The ST-RAM allocator allocates memory from a pool of reserved ST-RAM of
36  * configurable size, set aside on ST-RAM init.
37  * As long as this pool is not exhausted, allocation of real ST-RAM can be
41 /* set if kernel is in ST-RAM */
45 	.name = "ST-RAM Pool"
48 static unsigned long pool_size = 1024*1024;
50 static unsigned long stram_virt_offset;
73 	 * determine whether kernel code resides in ST-RAM  in atari_stram_init()
74 	 * (then ST-RAM is the first memory block at virtual 0x0)  in atari_stram_init()
84 	/* Should never come here! (There is always ST-Ram!) */  in atari_stram_init()
85 	panic("atari_stram_init: no ST-RAM found!");  in atari_stram_init()
91  * ST-RAM management, if the kernel resides in ST-RAM.
96 		pr_debug("atari_stram pool: kernel in ST-RAM, using alloc_bootmem!\n");  in atari_stram_reserve_pages()
103 		stram_pool.end = stram_pool.start + pool_size - 1;  in atari_stram_reserve_pages()
116  * ST-RAM management, if the kernel does not reside in ST-RAM.
122 		 * Skip page 0, as the fhe first 2 KiB are supervisor-only!  in atari_stram_map_pages()
124 		pr_debug("atari_stram pool: kernel not in ST-RAM, using ioremap!\n");  in atari_stram_map_pages()
126 		stram_pool.end = stram_pool.start + pool_size - 1;  in atari_stram_map_pages()
128 		stram_virt_offset = (unsigned long) ioremap(stram_pool.start,  in atari_stram_map_pages()
129 				resource_size(&stram_pool)) - stram_pool.start;  in atari_stram_map_pages()
140 void *atari_stram_to_virt(unsigned long phys)  in atari_stram_to_virt()
147 unsigned long atari_stram_to_phys(void *virt)  in atari_stram_to_phys()
149 	return (unsigned long)(virt - stram_virt_offset);  in atari_stram_to_phys()
154 void *atari_stram_alloc(unsigned long size, const char *owner)  in atari_stram_alloc()
168 	res->name = owner;  in atari_stram_alloc()
179 	return atari_stram_to_virt(res->start);  in atari_stram_alloc()
186 	unsigned long start = atari_stram_to_phys(addr);  in atari_stram_free()
188 	unsigned long size;  in atari_stram_free()