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ARC: enable uboot support unconditionally

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After reworking U-boot args handling code and adding paranoid
arguments check we can eliminate CONFIG_ARC_UBOOT_SUPPORT and
enable uboot support unconditionally.

For JTAG case we can assume that core registers will come up
reset value of 0 or in worst case we rely on user passing
'-on=clear_regs' to Metaware debugger.

Cc: stable@vger.kernel.org
Tested-by: Corentin LABBE <clabbe@baylibre.com>
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Eugeniy Paltsev
2019-02-14 18:07:45 +03:00
committed by Vineet Gupta
parent a66f2e57bd
commit 493a2f8124
6 changed files with 0 additions and 20 deletions
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2
arch/arc/kernel/head.S
View File

@@ -100,7 +100,6 @@ ENTRY(stext)
st.ab 0, [r5, 4]
1:
#ifdef CONFIG_ARC_UBOOT_SUPPORT
; Uboot - kernel ABI
; r0 = [0] No uboot interaction, [1] cmdline in r2, [2] DTB in r2
; r1 = magic number (always zero as of now)
@@ -108,7 +107,6 @@ ENTRY(stext)
; These are handled later in handle_uboot_args()
st r0, [@uboot_tag]
st r2, [@uboot_arg]
#endif
; setup "current" tsk and optionally cache it in dedicated r25
mov r9, @init_task

2
arch/arc/kernel/setup.c
View File

@@ -487,7 +487,6 @@ void __init handle_uboot_args(void)
bool use_embedded_dtb = true;
bool append_cmdline = false;
#ifdef CONFIG_ARC_UBOOT_SUPPORT
/* check that we know this tag */
if (uboot_tag != UBOOT_TAG_NONE &&
uboot_tag != UBOOT_TAG_CMDLINE &&
@@ -514,7 +513,6 @@ void __init handle_uboot_args(void)
append_cmdline = true;
ignore_uboot_args:
#endif
if (use_embedded_dtb) {
machine_desc = setup_machine_fdt(__dtb_start);