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author | Stanislav Galabov <sgalabov@FreeBSD.org> | 2016-04-16 19:44:41 +0000 |
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committer | Stanislav Galabov <sgalabov@FreeBSD.org> | 2016-04-16 19:44:41 +0000 |
commit | 70a157d7f538dba26eebe2bb1a86e16716996407 (patch) | |
tree | 409d632c1750d084dce05f0e6e12880331e20560 /sys/mips/mediatek | |
parent | 302b3e7dc41a6418d6a0fd0a8afff93823678aec (diff) | |
download | src-70a157d7f538dba26eebe2bb1a86e16716996407.tar.gz src-70a157d7f538dba26eebe2bb1a86e16716996407.zip |
Add support for boot arguments specification via fdt
Add suppport for passing boot arguments via FDT for mediatek/ralink SoCs.
This was taken from kan's work on CI20.
Since most OpenWRT dts files have bootargs defined, we use bsdbootargs
to specify FreeBSD specific arguments.
Approved by: adrian (mentor)
Sponsored by: Smartcom - Bulgaria AD
Differential Revision: https://reviews.freebsd.org/D5979
Notes
Notes:
svn path=/head/; revision=298127
Diffstat (limited to 'sys/mips/mediatek')
-rw-r--r-- | sys/mips/mediatek/mtk_machdep.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sys/mips/mediatek/mtk_machdep.c b/sys/mips/mediatek/mtk_machdep.c index eeadd4fac3a5..aaae78042662 100644 --- a/sys/mips/mediatek/mtk_machdep.c +++ b/sys/mips/mediatek/mtk_machdep.c @@ -192,6 +192,52 @@ mips_init(void) #endif } +static void +_parse_bootarg(char *v) +{ + char *n; + + if (*v == '-') { + while (*v != '\0') { + v++; + switch (*v) { + case 'a': boothowto |= RB_ASKNAME; break; + /* Someone should simulate that ;-) */ + case 'C': boothowto |= RB_CDROM; break; + case 'd': boothowto |= RB_KDB; break; + case 'D': boothowto |= RB_MULTIPLE; break; + case 'm': boothowto |= RB_MUTE; break; + case 'g': boothowto |= RB_GDB; break; + case 'h': boothowto |= RB_SERIAL; break; + case 'p': boothowto |= RB_PAUSE; break; + case 'r': boothowto |= RB_DFLTROOT; break; + case 's': boothowto |= RB_SINGLE; break; + case 'v': boothowto |= RB_VERBOSE; break; + } + } + } else { + n = strsep(&v, "="); + if (v == NULL) + kern_setenv(n, "1"); + else + kern_setenv(n, v); + } +} + +/* Parse cmd line args as env - copied from xlp_machdep. */ +/* XXX-BZ this should really be centrally provided for all (boot) code. */ +static void +_parse_bootargs(char *cmdline) +{ + char *v; + + while ((v = strsep(&cmdline, " \n")) != NULL) { + if (*v == '\0') + continue; + _parse_bootarg(v); + } +} + void platform_reset(void) { @@ -209,6 +255,8 @@ platform_start(__register_t a0 __unused, __register_t a1 __unused, char **argv = (char **)MIPS_PHYS_TO_KSEG0(a1); char **envp = (char **)MIPS_PHYS_TO_KSEG0(a2); void *dtbp; + phandle_t chosen; + char buf[2048]; /* clear the BSS and SBSS segments */ kernend = (vm_offset_t)&end; @@ -238,6 +286,13 @@ platform_start(__register_t a0 __unused, __register_t a1 __unused, init_static_kenv(boot1_env, sizeof(boot1_env)); + /* + * Get bsdbootargs from FDT if specified. + */ + chosen = OF_finddevice("/chosen"); + if (OF_getprop(chosen, "bsdbootargs", buf, sizeof(buf)) != -1) + _parse_bootargs(buf); + printf("FDT DTB at: 0x%08x\n", (uint32_t)dtbp); printf("CPU clock: %4dMHz\n", mtk_soc_get_cpuclk()/(1000*1000)); |