arch/csky/kernel/head.S

Source file repositories/reference/linux-study-clean/arch/csky/kernel/head.S

File Facts

System
Linux kernel
Corpus path
arch/csky/kernel/head.S
Extension
.S
Size
686 bytes
Lines
43
Domain
Architecture Layer
Bucket
arch/csky
Inferred role
Architecture Layer: arch/csky
Status
atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/page.h>
#include <abi/entry.h>

__HEAD
ENTRY(_start)
	SETUP_MMU

	/* set stack point */
	lrw     r6, init_thread_union + THREAD_SIZE
	mov	sp, r6

	jmpi	csky_start
END(_start)

#ifdef CONFIG_SMP
.align 10
ENTRY(_start_smp_secondary)
	SETUP_MMU

#ifdef CONFIG_PAGE_OFFSET_80000000
	lrw	r6, secondary_msa1
	ld.w	r6, (r6, 0)
	mtcr	r6, cr<31, 15>
#endif

	lrw     r6, secondary_pgd
	ld.w	r6, (r6, 0)
	mtcr	r6, cr<28, 15>
	mtcr	r6, cr<29, 15>

	/* set stack point */
	lrw     r6, secondary_stack
	ld.w	r6, (r6, 0)
	mov	sp, r6

	jmpi	csky_start_secondary
END(_start_smp_secondary)
#endif

Annotation

Implementation Notes