arm/mach-omap2/sleep34xx.S

1 /* SPDX-License-Identifier: GPL-2.0-or-later */
5  * Karthik Dasu <karthik-dp@ti.com>
9  * Richard Woodruff <r-woodruff2@ti.com>
57  * with non-Thumb-2-capable firmware.
86 	.arch armv7-a
89 	stmfd	sp!, {r4 - r11, lr}	@ save registers on stack
103 	ldmfd	sp!, {r4 - r11, pc}
115  * omap34xx_cpu_suspend() - This bit of code saves the CPU context if needed
121  * - only the minimum set of functions gets copied to internal SRAM at boot
122  *   and after wake-up from OFF mode, cf. omap_push_sram_idle. The function
125  * - when the OMAP wakes up it continues at different execution points
126  *   depending on the low power mode (non-OFF vs OFF modes),
131 	stmfd	sp!, {r4 - r11, lr}	@ save registers on stack
135 	 *   0 - No context lost
136 	 *   1 - Only L1 and logic lost
137 	 *   2 - Only L2 lost (Even L1 is retained we clean it along with L2)
138 	 *   3 - Both L1 and L2 lost and logic lost
143 	 * For non-OFF modes: jump to the WFI code in SRAM (omap3_do_wfi_sram)
155 	 *  - reuse that code is better
156 	 *  - it executes in a cached space so is faster than refetch per-block
157 	 *  - should be faster and will change with kernel
158 	 *  - 'might' have to copy address, load and jump to it
197  * Includes the resume path for non-OFF modes
201  * - executed from SRAM for non-off modes (omap3_do_wfi_sram),
202  * - executed from SDRAM for OFF mode (omap3_do_wfi).
224  * == Resume path for non-OFF modes ==
242  * Only used at return from non-OFF mode. For OFF
263 	/* allow DLL powerdown upon hw idle req */
270 	/* Is dll in lock mode? */
275 	/* wait till dll locks */
289 	/* disable/reenable DLL if not locked */
294 	bic	r6, #(1<<3)		@ disable dll
297 	orr	r6, r6, #(1<<3)		@ enable dll
303 	/* Re-enable C-bit if needed */
312  * == Exit point from non-OFF modes ==
315 	ldmfd	sp!, {r4 - r11, pc}	@ restore regs and return
328 	.word	. - omap3_do_wfi
363 	subs	r2, r2, #0x1	@ num_words--
451 	.long	l2_inv_api_params - .
471 	cmp	r1, #0x1		@ Test if L2 re-enable needed on 3630
474 	orr	r1, r1, #2		@ re-enable L2 cache
500 	.long	l2dis_3630 - .
523 	ldr	r4, sdrc_syscfg		@ get config addr
529 	ldr	r4, sdrc_mr_0		@ get config addr
532 	ldr	r4, sdrc_emr2_0		@ get config addr
535 	ldr	r4, sdrc_manual_0	@ get config addr
538 	ldr	r4, sdrc_mr_1		@ get config addr
541 	ldr	r4, sdrc_emr2_1		@ get config addr
544 	ldr	r4, sdrc_manual_1	@ get config addr
569 	.word	. - es3_sdrc_fix