From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- arch/sparc/prom/bootstr_32.c | 63 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 arch/sparc/prom/bootstr_32.c (limited to 'arch/sparc/prom/bootstr_32.c') diff --git a/arch/sparc/prom/bootstr_32.c b/arch/sparc/prom/bootstr_32.c new file mode 100644 index 000000000..e3b731ff0 --- /dev/null +++ b/arch/sparc/prom/bootstr_32.c @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * bootstr.c: Boot string/argument acquisition from the PROM. + * + * Copyright(C) 1995 David S. Miller (davem@caip.rutgers.edu) + */ + +#include +#include +#include + +#define BARG_LEN 256 +static char barg_buf[BARG_LEN] = { 0 }; +static char fetched __initdata = 0; + +char * __init +prom_getbootargs(void) +{ + int iter; + char *cp, *arg; + + /* This check saves us from a panic when bootfd patches args. */ + if (fetched) { + return barg_buf; + } + + switch (prom_vers) { + case PROM_V0: + cp = barg_buf; + /* Start from 1 and go over fd(0,0,0)kernel */ + for (iter = 1; iter < 8; iter++) { + arg = (*(romvec->pv_v0bootargs))->argv[iter]; + if (arg == NULL) + break; + while (*arg != 0) { + /* Leave place for space and null. */ + if (cp >= barg_buf + BARG_LEN - 2) + /* We might issue a warning here. */ + break; + *cp++ = *arg++; + } + *cp++ = ' '; + if (cp >= barg_buf + BARG_LEN - 1) + /* We might issue a warning here. */ + break; + } + *cp = 0; + break; + case PROM_V2: + case PROM_V3: + /* + * V3 PROM cannot supply as with more than 128 bytes + * of an argument. But a smart bootstrap loader can. + */ + strlcpy(barg_buf, *romvec->pv_v2bootargs.bootargs, sizeof(barg_buf)); + break; + default: + break; + } + + fetched = 1; + return barg_buf; +} -- cgit v1.2.3