-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
ARM: PRIMA2: add new SiRFmarco SMP SoC infrastructures
this patch adds tick timer, smp entries and generic DT machine for SiRFmarco dual-core SMP chips. with the added marco, we change the defconfig, using the same defconfig, we get a zImage which can work on both prima2 and marco. Signed-off-by: Barry Song <Baohua.Song@csr.com> Cc: Mark Rutland <mark.rutland@arm.com>
- Loading branch information
Barry Song
authored and
Barry Song
committed
Jan 22, 2013
1 parent
f2a9419
commit 4898de3
Showing
10 changed files
with
666 additions
and
1 deletion.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| /* | ||
| * Entry of the second core for CSR Marco dual-core SMP SoCs | ||
| * | ||
| * Copyright (c) 2012 Cambridge Silicon Radio Limited, a CSR plc group company. | ||
| * | ||
| * Licensed under GPLv2 or later. | ||
| */ | ||
|
|
||
| #include <linux/linkage.h> | ||
| #include <linux/init.h> | ||
|
|
||
| __INIT | ||
| /* | ||
| * Cold boot and hardware reset show different behaviour, | ||
| * system will be always panic if we warm-reset the board | ||
| * Here we invalidate L1 of CPU1 to make sure there isn't | ||
| * uninitialized data written into memory later | ||
| */ | ||
| ENTRY(v7_invalidate_l1) | ||
| mov r0, #0 | ||
| mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache | ||
| mcr p15, 2, r0, c0, c0, 0 | ||
| mrc p15, 1, r0, c0, c0, 0 | ||
|
|
||
| ldr r1, =0x7fff | ||
| and r2, r1, r0, lsr #13 | ||
|
|
||
| ldr r1, =0x3ff | ||
|
|
||
| and r3, r1, r0, lsr #3 @ NumWays - 1 | ||
| add r2, r2, #1 @ NumSets | ||
|
|
||
| and r0, r0, #0x7 | ||
| add r0, r0, #4 @ SetShift | ||
|
|
||
| clz r1, r3 @ WayShift | ||
| add r4, r3, #1 @ NumWays | ||
| 1: sub r2, r2, #1 @ NumSets-- | ||
| mov r3, r4 @ Temp = NumWays | ||
| 2: subs r3, r3, #1 @ Temp-- | ||
| mov r5, r3, lsl r1 | ||
| mov r6, r2, lsl r0 | ||
| orr r5, r5, r6 @ Reg = (Temp<<WayShift)|(NumSets<<SetShift) | ||
| mcr p15, 0, r5, c7, c6, 2 | ||
| bgt 2b | ||
| cmp r2, #0 | ||
| bgt 1b | ||
| dsb | ||
| isb | ||
| mov pc, lr | ||
| ENDPROC(v7_invalidate_l1) | ||
|
|
||
| /* | ||
| * SIRFSOC specific entry point for secondary CPUs. This provides | ||
| * a "holding pen" into which all secondary cores are held until we're | ||
| * ready for them to initialise. | ||
| */ | ||
| ENTRY(sirfsoc_secondary_startup) | ||
| bl v7_invalidate_l1 | ||
| mrc p15, 0, r0, c0, c0, 5 | ||
| and r0, r0, #15 | ||
| adr r4, 1f | ||
| ldmia r4, {r5, r6} | ||
| sub r4, r4, r5 | ||
| add r6, r6, r4 | ||
| pen: ldr r7, [r6] | ||
| cmp r7, r0 | ||
| bne pen | ||
|
|
||
| /* | ||
| * we've been released from the holding pen: secondary_stack | ||
| * should now contain the SVC stack for this core | ||
| */ | ||
| b secondary_startup | ||
| ENDPROC(sirfsoc_secondary_startup) | ||
|
|
||
| .align | ||
| 1: .long . | ||
| .long pen_release |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| /* | ||
| * CPU hotplug support for CSR Marco dual-core SMP SoCs | ||
| * | ||
| * Copyright (c) 2012 Cambridge Silicon Radio Limited, a CSR plc group company. | ||
| * | ||
| * Licensed under GPLv2 or later. | ||
| */ | ||
|
|
||
| #include <linux/kernel.h> | ||
| #include <linux/errno.h> | ||
| #include <linux/smp.h> | ||
|
|
||
| #include <asm/cacheflush.h> | ||
| #include <asm/smp_plat.h> | ||
|
|
||
| static inline void platform_do_lowpower(unsigned int cpu) | ||
| { | ||
| flush_cache_all(); | ||
|
|
||
| /* we put the platform to just WFI */ | ||
| for (;;) { | ||
| __asm__ __volatile__("dsb\n\t" "wfi\n\t" | ||
| : : : "memory"); | ||
| if (pen_release == cpu_logical_map(cpu)) { | ||
| /* | ||
| * OK, proper wakeup, we're done | ||
| */ | ||
| break; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /* | ||
| * platform-specific code to shutdown a CPU | ||
| * | ||
| * Called with IRQs disabled | ||
| */ | ||
| void sirfsoc_cpu_die(unsigned int cpu) | ||
| { | ||
| platform_do_lowpower(cpu); | ||
| } |
Oops, something went wrong.