Contributors: 6
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Alexandre Ghiti |
211 |
94.62% |
1 |
16.67% |
| JiSheng Zhang |
5 |
2.24% |
1 |
16.67% |
| Albert Ou |
3 |
1.35% |
1 |
16.67% |
| Zong Li |
2 |
0.90% |
1 |
16.67% |
| Thomas Gleixner |
1 |
0.45% |
1 |
16.67% |
| Nick Kossifidis |
1 |
0.45% |
1 |
16.67% |
| Total |
223 |
|
6 |
|
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/types.h>
#include <linux/init.h>
#include <linux/libfdt.h>
#include <linux/string.h>
#include <asm/pgtable.h>
#include <asm/setup.h>
static char early_cmdline[COMMAND_LINE_SIZE];
/*
* Declare the functions that are exported (but prefixed) here so that LLVM
* does not complain it lacks the 'static' keyword (which, if added, makes
* LLVM complain because the function is actually unused in this file).
*/
u64 set_satp_mode_from_cmdline(uintptr_t dtb_pa);
static char *get_early_cmdline(uintptr_t dtb_pa)
{
const char *fdt_cmdline = NULL;
unsigned int fdt_cmdline_size = 0;
int chosen_node;
if (!IS_ENABLED(CONFIG_CMDLINE_FORCE)) {
chosen_node = fdt_path_offset((void *)dtb_pa, "/chosen");
if (chosen_node >= 0) {
fdt_cmdline = fdt_getprop((void *)dtb_pa, chosen_node,
"bootargs", NULL);
if (fdt_cmdline) {
fdt_cmdline_size = strlen(fdt_cmdline);
strscpy(early_cmdline, fdt_cmdline,
COMMAND_LINE_SIZE);
}
}
}
if (IS_ENABLED(CONFIG_CMDLINE_EXTEND) ||
IS_ENABLED(CONFIG_CMDLINE_FORCE) ||
fdt_cmdline_size == 0 /* CONFIG_CMDLINE_FALLBACK */) {
strncat(early_cmdline, CONFIG_CMDLINE,
COMMAND_LINE_SIZE - fdt_cmdline_size);
}
return early_cmdline;
}
static u64 match_noXlvl(char *cmdline)
{
if (strstr(cmdline, "no4lvl"))
return SATP_MODE_48;
else if (strstr(cmdline, "no5lvl"))
return SATP_MODE_57;
return 0;
}
u64 set_satp_mode_from_cmdline(uintptr_t dtb_pa)
{
char *cmdline = get_early_cmdline(dtb_pa);
return match_noXlvl(cmdline);
}