/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_SCORE_FIXMAP_H #define _ASM_SCORE_FIXMAP_H #include <asm/page.h> #define PHY_RAM_BASE 0x00000000 #define PHY_IO_BASE 0x10000000 #define VIRTUAL_RAM_BASE 0xa0000000 #define VIRTUAL_IO_BASE 0xb0000000 #define RAM_SPACE_SIZE 0x10000000 #define IO_SPACE_SIZE 0x10000000 /* Kernel unmapped, cached 512MB */ #define KSEG1 0xa0000000 /* * Here we define all the compile-time 'special' virtual * addresses. The point is to have a constant address at * compile time, but to set the physical address only * in the boot process. We allocate these special addresses * from the end of virtual memory (0xfffff000) backwards. * Also this lets us do fail-safe vmalloc(), we * can guarantee that these special addresses and * vmalloc()-ed addresses never overlap. * * these 'compile-time allocated' memory buffers are * fixed-size 4k pages. (or larger if used with an increment * highger than 1) use fixmap_set(idx,phys) to associate * physical memory with fixmap indices. * * TLB entries of such buffers will not be flushed across * task switches. */ /* * on UP currently we will have no trace of the fixmap mechanizm, * no page table allocations, etc. This might change in the * future, say framebuffers for the console driver(s) could be * fix-mapped? */ enum fixed_addresses { #define FIX_N_COLOURS 8 FIX_CMAP_BEGIN, FIX_CMAP_END = FIX_CMAP_BEGIN + FIX_N_COLOURS, __end_of_fixed_addresses }; /* * used by vmalloc.c. * * Leave one empty page between vmalloc'ed areas and * the start of the fixmap, and leave one page empty * at the top of mem.. */ #define FIXADDR_TOP ((unsigned long)(long)(int)0xfefe0000) #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) #define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) #define __virt_to_fix(x) \ ((FIXADDR_TOP - ((x) & PAGE_MASK)) >> PAGE_SHIFT) extern void __this_fixmap_does_not_exist(void); /* * 'index to address' translation. If anyone tries to use the idx * directly without tranlation, we catch the bug with a NULL-deference * kernel oops. Illegal ranges of incoming indices are caught too. */ static inline unsigned long fix_to_virt(const unsigned int idx) { return __fix_to_virt(idx); } static inline unsigned long virt_to_fix(const unsigned long vaddr) { return __virt_to_fix(vaddr); } #endif /* _ASM_SCORE_FIXMAP_H */
Name | Type | Size | Permission | Actions |
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Kbuild | File | 340 B | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asmmacro.h | File | 2.48 KB | 0644 |
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atomic.h | File | 187 B | 0644 |
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bitops.h | File | 266 B | 0644 |
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bug.h | File | 578 B | 0644 |
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bugs.h | File | 154 B | 0644 |
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cache.h | File | 199 B | 0644 |
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cacheflush.h | File | 1.63 KB | 0644 |
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checksum.h | File | 5.61 KB | 0644 |
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cmpxchg.h | File | 1.02 KB | 0644 |
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delay.h | File | 567 B | 0644 |
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device.h | File | 162 B | 0644 |
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div64.h | File | 158 B | 0644 |
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dma.h | File | 171 B | 0644 |
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elf.h | File | 2.84 KB | 0644 |
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emergency-restart.h | File | 206 B | 0644 |
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exec.h | File | 181 B | 0644 |
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fixmap.h | File | 2.38 KB | 0644 |
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ftrace.h | File | 90 B | 0644 |
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futex.h | File | 158 B | 0644 |
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hardirq.h | File | 166 B | 0644 |
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hw_irq.h | File | 90 B | 0644 |
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io.h | File | 212 B | 0644 |
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irq.h | File | 794 B | 0644 |
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irq_regs.h | File | 258 B | 0644 |
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irqflags.h | File | 1.9 KB | 0644 |
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kdebug.h | File | 162 B | 0644 |
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kmap_types.h | File | 178 B | 0644 |
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linkage.h | File | 189 B | 0644 |
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local.h | File | 158 B | 0644 |
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local64.h | File | 33 B | 0644 |
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mmu.h | File | 157 B | 0644 |
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mmu_context.h | File | 2.68 KB | 0644 |
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module.h | File | 949 B | 0644 |
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page.h | File | 2.84 KB | 0644 |
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pci.h | File | 81 B | 0644 |
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percpu.h | File | 162 B | 0644 |
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pgalloc.h | File | 1.81 KB | 0644 |
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pgtable-bits.h | File | 990 B | 0644 |
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pgtable.h | File | 7.29 KB | 0644 |
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processor.h | File | 2.39 KB | 0644 |
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ptrace.h | File | 749 B | 0644 |
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scoreregs.h | File | 1.4 KB | 0644 |
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segment.h | File | 513 B | 0644 |
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setup.h | File | 1.01 KB | 0644 |
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shmparam.h | File | 170 B | 0644 |
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string.h | File | 327 B | 0644 |
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switch_to.h | File | 323 B | 0644 |
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syscalls.h | File | 229 B | 0644 |
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thread_info.h | File | 2.55 KB | 0644 |
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timex.h | File | 216 B | 0644 |
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tlb.h | File | 538 B | 0644 |
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tlbflush.h | File | 3.02 KB | 0644 |
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topology.h | File | 170 B | 0644 |
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uaccess.h | File | 10.78 KB | 0644 |
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ucontext.h | File | 34 B | 0644 |
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unaligned.h | File | 174 B | 0644 |
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user.h | File | 437 B | 0644 |
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