diff options
author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2017-07-05 13:25:22 (GMT) |
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committer | Tom Rini <trini@konsulko.com> | 2017-07-06 20:17:19 (GMT) |
commit | daab59ac05d8fd1092e34a4c695ac265ae700141 (patch) | |
tree | c9fe90a80281235d0bf3043d1d2e7c218f3ed383 /arch/avr32/include/asm/arch-at32ap700x/mmu.h | |
parent | 747c4c68c042babb2179b52b60bc78611e3e1183 (diff) | |
download | u-boot-daab59ac05d8fd1092e34a4c695ac265ae700141.tar.xz |
avr32: Retire AVR32 for good
AVR32 is gone. It's already more than two years for no support in Buildroot,
even longer there is no support in GCC (last version is heavily patched 4.2.4).
Linux kernel v4.12 got rid of it (and v4.11 didn't build successfully).
There is no good point to keep this support in U-Boot either.
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'arch/avr32/include/asm/arch-at32ap700x/mmu.h')
-rw-r--r-- | arch/avr32/include/asm/arch-at32ap700x/mmu.h | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/arch/avr32/include/asm/arch-at32ap700x/mmu.h b/arch/avr32/include/asm/arch-at32ap700x/mmu.h deleted file mode 100644 index 4736312..0000000 --- a/arch/avr32/include/asm/arch-at32ap700x/mmu.h +++ /dev/null @@ -1,66 +0,0 @@ -/* - * In order to deal with the hardcoded u-boot requirement that virtual - * addresses are always mapped 1:1 with physical addresses, we implement - * a small virtual memory manager so that we can use the MMU hardware in - * order to get the caching properties right. - * - * A few pages (or possibly just one) are locked in the TLB permanently - * in order to avoid recursive TLB misses, but most pages are faulted in - * on demand. - */ -#ifndef __ASM_ARCH_MMU_H -#define __ASM_ARCH_MMU_H - -#include <asm/sysreg.h> - -#define MMU_PAGE_SHIFT 20 -#define MMU_PAGE_SIZE (1UL << MMU_PAGE_SHIFT) -#define MMU_PAGE_ADDR_MASK (~(MMU_PAGE_SIZE - 1)) - -#define MMU_VMR_CACHE_NONE \ - (SYSREG_BF(AP, 3) | SYSREG_BF(SZ, 3) | SYSREG_BIT(TLBELO_D)) -#define MMU_VMR_CACHE_WBUF \ - (MMU_VMR_CACHE_NONE | SYSREG_BIT(B)) -#define MMU_VMR_CACHE_WRTHRU \ - (MMU_VMR_CACHE_NONE | SYSREG_BIT(TLBELO_C) | SYSREG_BIT(W)) -#define MMU_VMR_CACHE_WRBACK \ - (MMU_VMR_CACHE_WBUF | SYSREG_BIT(TLBELO_C)) - -/* - * This structure is used in our "page table". Instead of the usual - * x86-inspired radix tree, we let each entry cover an arbitrary-sized - * virtual address range and store them in a binary search tree. This is - * somewhat slower, but should use significantly less RAM, and we - * shouldn't get many TLB misses when using 1 MB pages anyway. - * - * With 1 MB pages, we need 12 bits to store the page number. In - * addition, we stick an Invalid bit in the high bit of virt_pgno (if - * set, it cannot possibly match any faulting page), and all the bits - * that need to be written to TLBELO in phys_pgno. - */ -struct mmu_vm_range { - uint16_t virt_pgno; - uint16_t nr_pages; - uint32_t phys; -}; - -/* - * An array of mmu_vm_range objects describing all pageable addresses. - * The array is sorted by virt_pgno so that the TLB miss exception - * handler can do a binary search to find the correct entry. - */ -extern struct mmu_vm_range mmu_vmr_table[]; - -/* - * Initialize the MMU. This will set up a fixed TLB entry for the static - * u-boot image at dest_addr and enable paging. - */ -void mmu_init_r(unsigned long dest_addr); - -/* - * Handle a TLB miss exception. This function is called directly from - * the exception vector table written in assembly. - */ -int mmu_handle_tlb_miss(void); - -#endif /* __ASM_ARCH_MMU_H */ |