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author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-26 17:25:38 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-26 17:25:38 -0700 |
commit | e404f91ed2180dfecbab15dd4d39c543353385fb (patch) | |
tree | c256e29b1c738d5e5b5478f19b369b1fd90bd1e2 /arch/tile/kernel/entry.S | |
parent | 18a043f9413277523cf5011e594caa1747db4948 (diff) | |
parent | e18105c128734b1671739ad4d85e216ebec28c61 (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
arch/tile: convert a BUG_ON to BUILD_BUG_ON
arch/tile: make ptrace() work properly for TILE-Gx COMPAT mode
arch/tile: support new info op generated by compiler
arch/tile: minor whitespace/naming changes for string support files
arch/tile: enable single-step support for TILE-Gx
arch/tile: parameterize system PLs to support KVM port
arch/tile: add Tilera's <arch/sim.h> header as an open-source header
arch/tile: Bomb C99 comments to C89 comments in tile's <arch/sim_def.h>
arch/tile: prevent corrupt top frame from causing backtracer runaway
arch/tile: various top-level Makefile cleanups
arch/tile: change lower bound on syscall error return to -4095
arch/tile: properly export __mb_incoherent for modules
arch/tile: provide a definition of MAP_STACK
kmemleak: add TILE to the list of supported architectures.
char: hvc: check for error case
arch/tile: Add a warning if we try to allocate too much vmalloc memory.
arch/tile: update some comments to clarify register usage.
arch/tile: use better "punctuation" for VMSPLIT_3_5G and friends
arch/tile: Use <asm-generic/syscalls.h>
tile: replace some BUG_ON checks with BUILD_BUG_ON checks
Diffstat (limited to 'arch/tile/kernel/entry.S')
-rw-r--r-- | arch/tile/kernel/entry.S | 34 |
1 files changed, 7 insertions, 27 deletions
diff --git a/arch/tile/kernel/entry.S b/arch/tile/kernel/entry.S index 3d01383b1b0e..fd8dc42abdcb 100644 --- a/arch/tile/kernel/entry.S +++ b/arch/tile/kernel/entry.S @@ -15,7 +15,9 @@ #include <linux/linkage.h> #include <linux/unistd.h> #include <asm/irqflags.h> +#include <asm/processor.h> #include <arch/abi.h> +#include <arch/spr_def.h> #ifdef __tilegx__ #define bnzt bnezt @@ -25,28 +27,6 @@ STD_ENTRY(current_text_addr) { move r0, lr; jrp lr } STD_ENDPROC(current_text_addr) -STD_ENTRY(_sim_syscall) - /* - * Wait for r0-r9 to be ready (and lr on the off chance we - * want the syscall to locate its caller), then make a magic - * simulator syscall. - * - * We carefully stall until the registers are readable in case they - * are the target of a slow load, etc. so that tile-sim will - * definitely be able to read all of them inside the magic syscall. - * - * Technically this is wrong for r3-r9 and lr, since an interrupt - * could come in and restore the registers with a slow load right - * before executing the mtspr. We may need to modify tile-sim to - * explicitly stall for this case, but we do not yet have - * a way to implement such a stall. - */ - { and zero, lr, r9 ; and zero, r8, r7 } - { and zero, r6, r5 ; and zero, r4, r3 } - { and zero, r2, r1 ; mtspr SIM_CONTROL, r0 } - { jrp lr } - STD_ENDPROC(_sim_syscall) - /* * Implement execve(). The i386 code has a note that forking from kernel * space results in no copy on write until the execve, so we should be @@ -102,7 +82,7 @@ STD_ENTRY(KBacktraceIterator_init_current) STD_ENTRY(cpu_idle_on_new_stack) { move sp, r1 - mtspr SYSTEM_SAVE_1_0, r2 + mtspr SPR_SYSTEM_SAVE_K_0, r2 } jal free_thread_info j cpu_idle @@ -124,15 +104,15 @@ STD_ENTRY(smp_nap) STD_ENTRY(_cpu_idle) { lnk r0 - movei r1, 1 + movei r1, KERNEL_PL } { addli r0, r0, _cpu_idle_nap - . mtspr INTERRUPT_CRITICAL_SECTION, r1 } - IRQ_ENABLE(r2, r3) /* unmask, but still with ICS set */ - mtspr EX_CONTEXT_1_1, r1 /* PL1, ICS clear */ - mtspr EX_CONTEXT_1_0, r0 + IRQ_ENABLE(r2, r3) /* unmask, but still with ICS set */ + mtspr SPR_EX_CONTEXT_K_1, r1 /* Kernel PL, ICS clear */ + mtspr SPR_EX_CONTEXT_K_0, r0 iret .global _cpu_idle_nap _cpu_idle_nap: |