1 /* SPDX-License-Identifier: GPL-2.0 */ 1 2 #ifndef _ASMPARISC_SHMPARAM_H 3 #define _ASMPARISC_SHMPARAM_H 4 5 /* 6 * PA-RISC uses virtually indexed & physically 7 * which has strict requirements when two page 8 * address are accessed through different mapp 9 * "Address Aliasing" in the arch docs for mor 10 * PA-RISC 1.1 (page 3-6): 11 * https://parisc.wiki.kernel.org/images-paris 12 * PA-RISC 2.0 (page F-5): 13 * https://parisc.wiki.kernel.org/images-paris 14 * 15 * For Linux we allow kernel and userspace to 16 * granularity (SHMLBA) but have to ensure tha 17 * mapped to the same physical address, the vi 18 * addresses modulo SHM_COLOUR are identical. 19 */ 20 #define SHMLBA PAGE_SIZE /* attach addr 21 #define SHM_COLOUR 0x00400000 /* shared mapp 22 23 #endif /* _ASMPARISC_SHMPARAM_H */ 24
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