a988465d0e
This commit wires up bootinfo's RNG seed attribute so that Linux VMs can have their RNG seeded from the earliest possible time in boot, just like the "rng-seed" device tree property on those platforms. The link contains the corresponding Linux patch. Link: https://lore.kernel.org/lkml/20220626111509.330159-1-Jason@zx2c4.com/ Based-on: <20220625152318.120849-1-Jason@zx2c4.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Message-Id: <20220626111804.330745-1-Jason@zx2c4.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
/*
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* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
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*
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* Bootinfo tags from linux bootinfo.h and bootinfo-mac.h:
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* This is an easily parsable and extendable structure containing all
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* information to be passed from the bootstrap to the kernel
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*
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* This structure is copied right after the kernel by the bootstrap
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* routine.
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*/
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#ifndef HW_M68K_BOOTINFO_H
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#define HW_M68K_BOOTINFO_H
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#define BOOTINFO0(as, base, id) \
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do { \
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stw_phys(as, base, id); \
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base += 2; \
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stw_phys(as, base, sizeof(struct bi_record)); \
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base += 2; \
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} while (0)
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#define BOOTINFO1(as, base, id, value) \
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do { \
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stw_phys(as, base, id); \
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base += 2; \
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stw_phys(as, base, sizeof(struct bi_record) + 4); \
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base += 2; \
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stl_phys(as, base, value); \
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base += 4; \
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} while (0)
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#define BOOTINFO2(as, base, id, value1, value2) \
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do { \
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stw_phys(as, base, id); \
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base += 2; \
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stw_phys(as, base, sizeof(struct bi_record) + 8); \
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base += 2; \
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stl_phys(as, base, value1); \
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base += 4; \
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stl_phys(as, base, value2); \
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base += 4; \
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} while (0)
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#define BOOTINFOSTR(as, base, id, string) \
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do { \
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int i; \
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stw_phys(as, base, id); \
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base += 2; \
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stw_phys(as, base, \
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(sizeof(struct bi_record) + strlen(string) + 2) & ~1); \
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base += 2; \
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for (i = 0; string[i]; i++) { \
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stb_phys(as, base++, string[i]); \
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} \
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stb_phys(as, base++, 0); \
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base = (base + 1) & ~1; \
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} while (0)
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#define BOOTINFODATA(as, base, id, data, len) \
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do { \
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int i; \
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stw_phys(as, base, id); \
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base += 2; \
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stw_phys(as, base, \
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(sizeof(struct bi_record) + len + 3) & ~1); \
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base += 2; \
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stw_phys(as, base, len); \
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base += 2; \
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for (i = 0; i < len; ++i) { \
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stb_phys(as, base++, data[i]); \
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} \
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base = (base + 1) & ~1; \
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} while (0)
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#endif
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