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2008-10-15powerpc: Fix 32-bit SMP boot on CHRPBenjamin Herrenschmidt
prom_init was changed to take a new argument, the address where the kernel is loaded, which is now used to copy the SMP spin loop down before use. However, only head_64.S was adapted to pass this new value, not head_32.S, thus breaking SMP boot on 32-bit SMP CHRP machines. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-09-24POWERPC: Allow 32-bit hashed pgtable code to support 36-bit physicalBecky Bruce
This rearranges a bit of code, and adds support for 36-bit physical addressing for configs that use a hashed page table. The 36b physical support is not enabled by default on any config - it must be explicitly enabled via the config system. This patch *only* expands the page table code to accomodate large physical addresses on 32-bit systems and enables the PHYS_64BIT config option for 86xx. It does *not* allow you to boot a board with more than about 3.5GB of RAM - for that, SWIOTLB support is also required (and coming soon). Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-08-18powerpc: Fix TLB invalidation on boot on 32-bitRocky Craig
The intent of "flush_tlbs" is to invalidate all TLB entries by doing a TLB invalidate instruction for all pages in the address range 0 to 0x00400000. A loop counter is set up at the high value and decremented by page size. However, the loop is only done once as the sense of the conditional branch at the loop end does not match the setup/decrement. This fixes it to do the whole range by correcting the branch condition. Signed-off-by: Rocky Craig <rocky.craig@hp.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-07-01powerpc: Make load_up_fpu and load_up_altivec callableMichael Neuling
Make load_up_fpu and load_up_altivec callable so they can be reused by the VSX code. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-04-18[POWERPC] Move stackframe definitions to common headerBenjamin Herrenschmidt
This moves various definitions used all over the place to parse stack frames to ptrace.h so only one definition is needed. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-02-26[POWERPC] Remove dead code at KernelAltiVecDale Farnsworth
This code isn't referenced anywhere, so remove it. Signed-off-by: Dale Farnsworth <dale@farnsworth.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-12-06[POWERPC] Fix swapper_pg_dir size when CONFIG_PTE_64BIT=y on FSL_BOOKEKumar Gala
The size of swapper_pg_dir is 8k instead of 4k when using 64-bit PTEs (CONFIG_PTE_64BIT). This was reported by Cedric Hombourger <chombourger@gmail.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-10-11[POWERPC] Use PAGE_OFFSET to tell if an address is user/kernel in SW TLB ↵Kumar Gala
handlers Move to using PAGE_OFFSET instead of TASK_SIZE or KERNELBASE value on 6xx/40x/44x/fsl-booke to determine if the faulting address is a kernel or user space address. This mimics how the macro is_kernel_addr() works. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-10-03[POWERPC] Add early debug console for CPM serial ports.Scott Wood
This code assumes that the ports have been previously set up, with buffers in DPRAM. Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-09-19[POWERPC] Remove cmd_line from head*.SStephen Rothwell
It is just a C char array, so declare it thusly. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-09-14[POWERPC] Fix modpost warnings from head*.S on ppc32Kumar Gala
We get warnings like the following from the various ppc32 head*.S files: WARNING: vmlinux.o(.text+0x358): Section mismatch: reference to .init.text:early_init (between 'skpinv' and 'interrupt_base') WARNING: vmlinux.o(.text+0x380): Section mismatch: reference to .init.text:machine_init (between 'skpinv' and 'interrupt_base') WARNING: vmlinux.o(.text+0x384): Section mismatch: reference to .init.text:MMU_init (between 'skpinv' and 'interrupt_base') WARNING: vmlinux.o(.text+0x3aa): Section mismatch: reference to .init.text:start_kernel (between 'skpinv' and 'interrupt_base') WARNING: vmlinux.o(.text+0x3ae): Section mismatch: reference to .init.text:start_kernel (between 'skpinv' and 'interrupt_base') Added a .text.head section simliar to what other architectures do since modpost already excludes this from its warnings. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-09-14[POWERPC] Check _PAGE_RW and _PAGE_PRESENT on kernel addressesScott Wood
Previously, the TLB miss handlers assumed that pages above KERNELBASE are always present and read/write. This assumption is false in the case of CONFIG_DEBUG_PAGEALLOC. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-14[POWERPC] Remove the dregs of APUS support from arch/powerpcDavid Gibson
APUS (the Amiga Power-Up System) is not supported under arch/powerpc and it's unlikely it ever will be. Therefore, this patch removes the fragments of APUS support code from arch/powerpc which have been copied from arch/ppc. A few APUS references are left in asm-powerpc in .h files which are still used from arch/ppc. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-01-24[POWERPC] Remove the broken Gemini supportAdrian Bunk
Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-12-08[POWERPC] Add support for FP emulation for the e300c2 coreKim Phillips
The e300c2 has no FPU. Its MSR[FP] is grounded to zero. If an attempt is made to execute a floating point instruction (including floating-point load, store, or move instructions), the e300c2 takes a floating-point unavailable interrupt. This patch adds support for FP emulation on the e300c2 by declaring a new CPU_FTR_FP_TAKES_FPUNAVAIL, where FP unavail interrupts are intercepted and redirected to the ProgramCheck exception path for correct emulation handling. (If we run out of CPU_FTR bits we could look to reclaim this bit by adding support to test the cpu_user_features for PPC_FEATURE_HAS_FPU instead) It adds a nop to the exception path for 32-bit processors with a FPU. Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-21[POWERPC] Add starting of secondary 86xx CPUs.Jon Loeliger
Clear the high BATS during load_up_mmu if FTR_HAS_HIGH_BATS. Allow just a bit more time for secondary CPUs to phone home. Signed-off-by: Wei Zhang <Wei.Zhang@freescale.com> Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com> Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-02-24[PATCH] powerpc: fix altivec_unavailable_exception OopsesAlan Curry
altivec_unavailable_exception is called without setting r3... it looks like the r3 that actually gets passed in as struct pt_regs *regs is the undisturbed value of r3 at the time the altivec instruction was encountered. The user actually gets to choose the pt_regs printed in the Oops! This fixes the oops by passing the correct pt_regs pointer to altivec_unavailable_exception. Signed-off-by: Alan Curry <pacman@TheWorld.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09powerpc: set CONFIG_PPC_OF=y always for ARCH=powerpcPaul Mackerras
The CONFIG_PPC_OF symbol is used to mean that the firmware device tree access functions are available. Since we always have a device tree with ARCH=powerpc, make CONFIG_PPC_OF always Y for ARCH=powerpc. This fixes some compile errors reported by Kumar Gala, but in a different way to his patch. This also makes prom_parse.o be compiled only if CONFIG_PPC_OF so that non-OF ARCH=ppc platforms will compile. Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] powerpc: G4+ oprofile supportAndy Fleming
This patch adds oprofile support for the 7450 and all its multitudinous derivatives. * Added 7450 (and derivatives) support for oprofile * Changed e500 cputable to have oprofile model and cpu_type fields * Added support for classic 32-bit performance monitor interrupt * Cleaned up common powerpc oprofile code to be as common as possible * Cleaned up oprofile_impl.h to reflect 32 bit classic code * Added 32-bit MMCRx bitfield definitions and SPR numbers Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] powerpc: Add back support for booting from BootX (#2)Benjamin Herrenschmidt
ARCH=powerpc couldn't boot from BootX as it uses a "different" way of getting in the kernel. This patch adds the necessary trampolines, creating a flattened device-tree from the tree passed from MacOS, and initializing the btext engine early for really-early debugging. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] powerpc: Unify udbg (#2)Benjamin Herrenschmidt
This patch unifies udbg for both ppc32 and ppc64 when building the merged achitecture. xmon now has a single "back end". The powermac udbg stuff gets enriched with some ADB capabilities and btext output. In addition, the early_init callback is now called on ppc32 as well, approx. in the same order as ppc64 regarding device-tree manipulations. The init sequences of ppc32 and ppc64 are getting closer, I'll unify them in a later patch. For now, you can force udbg to the scc using "sccdbg" or to btext using "btextdbg" on powermacs. I'll implement a cleaner way of forcing udbg output to something else than the autodetected OF output device in a later patch. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-11powerpc: Initialize secondary CPU setup for 32-bit SMPPaul Mackerras
32-bit SMP powermacs weren't booting with ARCH=powerpc because the boot cpu wasn't saving away the state of various control registers, but the secondary CPUs were loading them from the uninitialized state. This adds the necessary save-state call. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-10-28powerpc: Merge xmonPaul Mackerras
The merged version follows the ppc64 version pretty closely mostly, and in fact ARCH=ppc64 now uses the arch/powerpc/xmon version. The main difference for ppc64 is that the 'p' command to call show_state (which was always pretty dodgy) has been replaced by the ppc32 'p' command, which calls a given procedure (so in fact the old 'p' command behaviour can be achieved with 'p $show_state'). Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-10-28powerpc: Rename asm offset TRAP to _TRAP for 32-bitPaul Mackerras
... for consistency with 64-bit. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-10-26powerpc: Merge 32-bit CHRP support.Paul Mackerras
SMP still needs more work but UP gets as far as starting userspace at least. This uses the 64-bit-style code for spinning up the cpus. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-10-18powerpc: Fix various compile errors with ARCH=ppc, ppc64 and powerpcPaul Mackerras
This makes ppc use the syscalls.c from arch/powerpc/kernel, exports copy_and_flush from head_32.S for use by prom_init.c (ARCH=powerpc), and consolidates the sys_fadvise64_64 implementations for 32-bit. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-10-17powerpc: Initialize btext subsystem later, after prom_initPaul Mackerras
We were initializing the btext stuff from prom_init(), thus breaking the rule that all communication between prom_init() and the rest of the kernel has to be via the flattened device tree. This removes the btext initialization calls from prom_init() and initializes it instead after the device tree is unflattened. It would be nice to do it earlier, but that needs some more infrastructure to find the properties we need in the flattened device tree. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-10-17ppc32: use L1_CACHE_SHIFT/L1_CACHE_BYTESStephen Rothwell
instead of L1_CACHE_LINE_SIZE and LG_L1_CACHE_LINE_SIZE Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
2005-10-10powerpc: Use reg.h instead of processor.h when we just want reg namesPaul Mackerras
Now that the register names and bit definitions are all in reg.h, use that instead of processor.h in assembly code in a few places. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-10-10powerpc: Rename files to have consistent _32/_64 suffixesPaul Mackerras
This doesn't change any code, just renames things so we consistently have foo_32.c and foo_64.c where we have separate 32- and 64-bit versions. Signed-off-by: Paul Mackerras <paulus@samba.org>