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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/mach-pxa/standby.S | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/mach-pxa/standby.S')
-rw-r--r-- | kernel/arch/arm/mach-pxa/standby.S | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-pxa/standby.S b/kernel/arch/arm/mach-pxa/standby.S new file mode 100644 index 000000000..eab1645bb --- /dev/null +++ b/kernel/arch/arm/mach-pxa/standby.S @@ -0,0 +1,114 @@ +/* + * PXA27x standby mode + * + * Author: David Burrage + * + * 2005 (c) MontaVista Software, Inc. This file is licensed under + * the terms of the GNU General Public License version 2. This program + * is licensed "as is" without any warranty of any kind, whether express + * or implied. + */ + +#include <linux/linkage.h> +#include <asm/assembler.h> +#include <mach/hardware.h> + +#include <mach/pxa2xx-regs.h> + + .text + +#ifdef CONFIG_PXA27x +ENTRY(pxa_cpu_standby) + ldr r0, =PSSR + mov r1, #(PSSR_PH | PSSR_STS) + mov r2, #PWRMODE_STANDBY + mov r3, #UNCACHED_PHYS_0 @ Read mem context in. + ldr ip, [r3] + b 1f + + .align 5 +1: mcr p14, 0, r2, c7, c0, 0 @ put the system into Standby + str r1, [r0] @ make sure PSSR_PH/STS are clear + ret lr + +#endif + +#ifdef CONFIG_PXA3xx + +#define PXA3_MDCNFG 0x0000 +#define PXA3_MDCNFG_DMCEN (1 << 30) +#define PXA3_DDR_HCAL 0x0060 +#define PXA3_DDR_HCAL_HCRNG 0x1f +#define PXA3_DDR_HCAL_HCPROG (1 << 28) +#define PXA3_DDR_HCAL_HCEN (1 << 31) +#define PXA3_DMCIER 0x0070 +#define PXA3_DMCIER_EDLP (1 << 29) +#define PXA3_DMCISR 0x0078 +#define PXA3_RCOMP 0x0100 +#define PXA3_RCOMP_SWEVAL (1 << 31) + +ENTRY(pm_enter_standby_start) + mov r1, #0xf6000000 @ DMEMC_REG_BASE (PXA3_MDCNFG) + add r1, r1, #0x00100000 + + /* + * Preload the TLB entry for accessing the dynamic memory + * controller registers. Note that page table lookups will + * fail until the dynamic memory controller has been + * reinitialised - and that includes MMU page table walks. + * This also means that only the dynamic memory controller + * can be reliably accessed in the code following standby. + */ + ldr r2, [r1] @ Dummy read PXA3_MDCNFG + + mcr p14, 0, r0, c7, c0, 0 + .rept 8 + nop + .endr + + ldr r0, [r1, #PXA3_DDR_HCAL] @ Clear (and wait for) HCEN + bic r0, r0, #PXA3_DDR_HCAL_HCEN + str r0, [r1, #PXA3_DDR_HCAL] +1: ldr r0, [r1, #PXA3_DDR_HCAL] + tst r0, #PXA3_DDR_HCAL_HCEN + bne 1b + + ldr r0, [r1, #PXA3_RCOMP] @ Initiate RCOMP + orr r0, r0, #PXA3_RCOMP_SWEVAL + str r0, [r1, #PXA3_RCOMP] + + mov r0, #~0 @ Clear interrupts + str r0, [r1, #PXA3_DMCISR] + + ldr r0, [r1, #PXA3_DMCIER] @ set DMIER[EDLP] + orr r0, r0, #PXA3_DMCIER_EDLP + str r0, [r1, #PXA3_DMCIER] + + ldr r0, [r1, #PXA3_DDR_HCAL] @ clear HCRNG, set HCPROG, HCEN + bic r0, r0, #PXA3_DDR_HCAL_HCRNG + orr r0, r0, #PXA3_DDR_HCAL_HCEN | PXA3_DDR_HCAL_HCPROG + str r0, [r1, #PXA3_DDR_HCAL] + +1: ldr r0, [r1, #PXA3_DMCISR] + tst r0, #PXA3_DMCIER_EDLP + beq 1b + + ldr r0, [r1, #PXA3_MDCNFG] @ set PXA3_MDCNFG[DMCEN] + orr r0, r0, #PXA3_MDCNFG_DMCEN + str r0, [r1, #PXA3_MDCNFG] +1: ldr r0, [r1, #PXA3_MDCNFG] + tst r0, #PXA3_MDCNFG_DMCEN + beq 1b + + ldr r0, [r1, #PXA3_DDR_HCAL] @ set PXA3_DDR_HCAL[HCRNG] + orr r0, r0, #2 @ HCRNG + str r0, [r1, #PXA3_DDR_HCAL] + + ldr r0, [r1, #PXA3_DMCIER] @ Clear the interrupt + bic r0, r0, #0x20000000 + str r0, [r1, #PXA3_DMCIER] + + ret lr +ENTRY(pm_enter_standby_end) + +#endif |