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authorJames Morris <james.l.morris@oracle.com>2012-08-17 20:42:30 +1000
committerJames Morris <james.l.morris@oracle.com>2012-08-17 20:42:30 +1000
commit51b743fe87d7fb3dba7a2ff4a1fe23bb65dc2245 (patch)
treef8b8f601713a3ecb264eb9f145636343d9350520 /arch/blackfin/mach-bf609/dpm.S
parent9f99798ff49e73dded73a8c674044ea6fb6af651 (diff)
parentd9875690d9b89a866022ff49e3fcea892345ad92 (diff)
downloadlinux-51b743fe87d7fb3dba7a2ff4a1fe23bb65dc2245.tar.gz
Merge tag 'v3.6-rc2' into next
Linux 3.6-rc2 Resync with Linus.
Diffstat (limited to 'arch/blackfin/mach-bf609/dpm.S')
-rw-r--r--arch/blackfin/mach-bf609/dpm.S157
1 files changed, 157 insertions, 0 deletions
diff --git a/arch/blackfin/mach-bf609/dpm.S b/arch/blackfin/mach-bf609/dpm.S
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+++ b/arch/blackfin/mach-bf609/dpm.S
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+#include <linux/linkage.h>
+#include <asm/blackfin.h>
+#include <asm/dpmc.h>
+
+#include <asm/context.S>
+
+#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);
+
+ bfin_init_pm_bench_cycles;
+
+ [P0] = R3;
+
+ SSYNC;
+ENDPROC(_enter_hibernate)
+
+/* DPM wake up interrupt won't wake up core on bf60x if its core IMASK
+ * is disabled. This behavior differ from bf5xx serial processor.
+ */
+ENTRY(_dummy_deepsleep)
+ [--sp] = SYSCFG;
+ [--sp] = (R7:0,P5:0);
+ cli r0;
+
+ /* get wake up interrupt ID */
+ P0.l = LO(SEC_SCI_BASE + SEC_CSID);
+ P0.h = HI(SEC_SCI_BASE + SEC_CSID);
+ R0 = [P0];
+
+ /* ACK wake up interrupt in SEC */
+ P1.l = LO(SEC_END);
+ P1.h = HI(SEC_END);
+
+ [P1] = R0;
+ SSYNC;
+
+ /* restore EVT 11 entry */
+ p0.h = hi(EVT11);
+ p0.l = lo(EVT11);
+ p1.h = _evt_evt11;
+ p1.l = _evt_evt11;
+
+ [p0] = p1;
+ SSYNC;
+
+ (R7:0,P5:0) = [sp++];
+ SYSCFG = [sp++];
+ RTI;
+ENDPROC(_dummy_deepsleep)
+
+ENTRY(_enter_deepsleep)
+ LINK 0xC;
+ [--sp] = (R7:0,P5:0);
+
+ /* Change EVT 11 entry to dummy handler for wake up event */
+ p0.h = hi(EVT11);
+ p0.l = lo(EVT11);
+ p1.h = _dummy_deepsleep;
+ p1.l = _dummy_deepsleep;
+
+ [p0] = p1;
+
+ P0.H = HI(PM_STACK);
+ P0.L = LO(PM_STACK);
+
+ EX_SCRATCH_REG = SP;
+ SP = P0;
+
+ SSYNC;
+
+ /* should put ddr to self refresh mode before sleep */
+ call _bf609_ddr_sr;
+
+ /* Set DPM controller to deep sleep mode */
+ P0.H = HI(DPM0_CTL);
+ P0.L = LO(DPM0_CTL);
+ R3.H = HI(0x00000008);
+ R3.L = LO(0x00000008);
+ [P0] = R3;
+ CSYNC;
+
+ /* Enable evt 11 in IMASK before idle, otherwise core doesn't wake up. */
+ r0.l = 0x800;
+ r0.h = 0;
+ sti r0;
+ SSYNC;
+
+ bfin_init_pm_bench_cycles;
+
+ /* Fall into deep sleep in idle*/
+ idle;
+ SSYNC;
+
+ /* Restore PLL after wake up from deep sleep */
+ call _bf609_resume_ccbuf;
+
+ /* turn ddr out of self refresh mode */
+ call _bf609_ddr_sr_exit;
+
+ SP = EX_SCRATCH_REG;
+
+ (R7:0,P5:0) = [SP++];
+ UNLINK;
+ RTS;
+ENDPROC(_enter_deepsleep)
+
+.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)
+