diff options
Diffstat (limited to 'arch/arc/kernel/setup.c')
| -rw-r--r-- | arch/arc/kernel/setup.c | 39 |
1 files changed, 27 insertions, 12 deletions
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c index 643eae4436e0..ffb60b4f6f86 100644 --- a/arch/arc/kernel/setup.c +++ b/arch/arc/kernel/setup.c @@ -29,7 +29,10 @@ int running_on_hw = 1; /* vs. on ISS */ -char __initdata command_line[COMMAND_LINE_SIZE]; +/* Part of U-boot ABI: see head.S */ +int __initdata uboot_tag; +char __initdata *uboot_arg; + const struct machine_desc *machine_desc; struct task_struct *_current_task[NR_CPUS]; /* For stack switching */ @@ -311,19 +314,31 @@ void setup_processor(void) arc_chk_fpu(); } +static inline int is_kernel(unsigned long addr) +{ + if (addr >= (unsigned long)_stext && addr <= (unsigned long)_end) + return 1; + return 0; +} + void __init setup_arch(char **cmdline_p) { - /* This also populates @boot_command_line from /bootargs */ - machine_desc = setup_machine_fdt(__dtb_start); - if (!machine_desc) - panic("Embedded DT invalid\n"); - - /* Append any u-boot provided cmdline */ -#ifdef CONFIG_CMDLINE_UBOOT - /* Add a whitespace seperator between the 2 cmdlines */ - strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); - strlcat(boot_command_line, command_line, COMMAND_LINE_SIZE); -#endif + machine_desc = setup_machine_fdt(__dtb_start); + if (!machine_desc) + panic("Embedded DT invalid\n"); + + /* + * Append uboot cmdline to embedded DT cmdline. + * setup_machine_fdt() would have populated @boot_command_line + */ + if (uboot_tag == 1) { + BUG_ON(is_kernel(unsigned long)uboot_arg); + + /* Ensure a whitespace between the 2 cmdlines */ + strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); + strlcat(boot_command_line, uboot_arg, + COMMAND_LINE_SIZE); + } /* Save unparsed command line copy for /proc/cmdline */ *cmdline_p = boot_command_line; |
