linux-vybrid_public/arch/blackfin/mach-bf609/hibernate.S

#include <linux/linkage.h>
#include <asm/blackfin.h>
#include <asm/dpmc.h>

#define PM_STACK   (COREA_L1_SCRATCH_START + L1_SCRATCH_LENGTH - 12)

.section .l1.text
ENTRY(_enter_hibernate)
	/* switch stack to L1 scratch, prepare for ddr srfr */
	P0.H = HI(PM_STACK);
	P0.L = LO(PM_STACK);
	SP = P0;

	call _bf609_ddr_sr;
	call _bfin_hibernate_syscontrol;

	P0.H = HI(DPM0_RESTORE4);
	P0.L = LO(DPM0_RESTORE4);
	P1.H = _bf609_pm_data;
	P1.L = _bf609_pm_data;
	[P0] = P1;

	P0.H = HI(DPM0_CTL);
	P0.L = LO(DPM0_CTL);
	R3.H = HI(0x00000010);
	R3.L = LO(0x00000010);
	[P0] = R3;

	SSYNC;
ENDPROC(_enter_hibernate_mode)

.section .text
ENTRY(_bf609_hibernate)
	bfin_cpu_reg_save;
	bfin_core_mmr_save;

	P0.H = _bf609_pm_data;
	P0.L = _bf609_pm_data;
	R1.H = 0xDEAD;
	R1.L = 0xBEEF;
	R2.H = .Lpm_resume_here;
	R2.L = .Lpm_resume_here;
	[P0++] = R1;
	[P0++] = R2;
	[P0++] = SP;

	P1.H = _enter_hibernate;
	P1.L = _enter_hibernate;

	call (P1);
.Lpm_resume_here:

	bfin_core_mmr_restore;
	bfin_cpu_reg_restore;

	[--sp] = RETI;  /* Clear Global Interrupt Disable */
	SP += 4;

	RTS;

ENDPROC(_bf609_hibernate)