kernel/linux.git/arch/powerpc/mm/init_32.c, branch linux-4.4.y

powerpc: Remove superfluous bootmem includes

2014-11-09T22:59:26+00:00

Lots of places included bootmem.h even when not using bootmem. Signed-off-by: Anton Blanchard Tested-by: Emil Medve Signed-off-by: Michael Ellerman

powerpc: Remove bootmem allocator

2014-11-09T22:59:25+00:00

At the moment we transition from the memblock alloctor to the bootmem allocator. Gitting rid of the bootmem allocator removes a bunch of complicated code (most of which I owe the dubious honour of being responsible for writing). Signed-off-by: Anton Blanchard Tested-by: Emil Medve Signed-off-by: Michael Ellerman

powerpc: Fix section mismatch warning

2014-10-30T00:22:33+00:00

Add __init to MMU_setup() which uses __initdata boot_command_line. Also MMU_setup() is only called from MMU_init(), which is also __init. Warning appeared since commit 3e47d1474c2b. Fixes: 3e47d1474c2b ("powerpc: Remove powerpc specific cmd_line") Signed-off-by: Fabian Frederick [mpe: Update changelog] Signed-off-by: Michael Ellerman

powerpc: Remove powerpc specific cmd_line

2014-10-02T07:33:55+00:00

There is no need for yet another copy of the command line, just use boot_command_line like everyone else. Signed-off-by: Anton Blanchard Signed-off-by: Michael Ellerman

powerpc/8xx: Fixing memory init issue with CONFIG_PIN_TLB

2013-10-29T02:11:22+00:00

Activating CONFIG_PIN_TLB allows access to the 24 first Mbytes of memory at bootup instead of 8. It is needed for "big" kernels for instance when activating CONFIG_LOCKDEP_SUPPORT. This needs to be taken into account in init_32 too, otherwise memory allocation soon fails after startup. Signed-off-by: Christophe Leroy Acked-by: Joakim Tjernlund Signed-off-by: Scott Wood

ppc: init_32: Fix error typo "CONFIG_START_KERNEL"

2013-08-20T11:07:31+00:00

Signed-off-by: Paul Bolle Signed-off-by: Jiri Kosina

Disintegrate asm/system.h for PowerPC

2012-03-28T17:30:02+00:00

Disintegrate asm/system.h for PowerPC. Signed-off-by: David Howells Acked-by: Benjamin Herrenschmidt cc: linuxppc-dev@lists.ozlabs.org

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

2012-01-07T01:58:22+00:00

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (185 commits) powerpc: fix compile error with 85xx/p1010rdb.c powerpc: fix compile error with 85xx/p1023_rds.c powerpc/fsl: add MSI support for the Freescale hypervisor arch/powerpc/sysdev/fsl_rmu.c: introduce missing kfree powerpc/fsl: Add support for Integrated Flash Controller powerpc/fsl: update compatiable on fsl 16550 uart nodes powerpc/85xx: fix PCI and localbus properties in p1022ds.dts powerpc/85xx: re-enable ePAPR byte channel driver in corenet32_smp_defconfig powerpc/fsl: Update defconfigs to enable some standard FSL HW features powerpc: Add TBI PHY node to first MDIO bus sbc834x: put full compat string in board match check powerpc/fsl-pci: Allow 64-bit PCIe devices to DMA to any memory address powerpc: Fix unpaired probe_hcall_entry and probe_hcall_exit offb: Fix setting of the pseudo-palette for >8bpp offb: Add palette hack for qemu "standard vga" framebuffer offb: Fix bug in calculating requested vram size powerpc/boot: Change the WARN to INFO for boot wrapper overlap message powerpc/44x: Fix build error on currituck platform powerpc/boot: Change the load address for the wrapper to fit the kernel powerpc/44x: Enable CRASH_DUMP for 440x ... Fix up a trivial conflict in arch/powerpc/include/asm/cputime.h due to the additional sparse-checking code for cputime_t.

powerpc: Define virtual-physical translations for RELOCATABLE

2011-12-20T15:21:34+00:00

We find the runtime address of _stext and relocate ourselves based on the following calculation. virtual_base = ALIGN(KERNELBASE,KERNEL_TLB_PIN_SIZE) + MODULO(_stext.run,KERNEL_TLB_PIN_SIZE) relocate() is called with the Effective Virtual Base Address (as shown below) | Phys. Addr| Virt. Addr | Page |------------------------| Boundary | | | | | | | | | Kernel Load |___________|_ __ _ _ _ _|<- Effective Addr(_stext)| | ^ |Virt. Base Addr | | | | | | | | | |reloc_offset| | | | | | | | | | |______v_____|<-(KERNELBASE)%TLB_SIZE | | | | | | | | | Page |-----------|------------| Boundary | | | On BookE, we need __va() & __pa() early in the boot process to access the device tree. Currently this has been defined as : #define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) - PHYSICAL_START + KERNELBASE) where: PHYSICAL_START is kernstart_addr - a variable updated at runtime. KERNELBASE is the compile time Virtual base address of kernel. This won't work for us, as kernstart_addr is dynamic and will yield different results for __va()/__pa() for same mapping. e.g., Let the kernel be loaded at 64MB and KERNELBASE be 0xc0000000 (same as PAGE_OFFSET). In this case, we would be mapping 0 to 0xc0000000, and kernstart_addr = 64M Now __va(1MB) = (0x100000) - (0x4000000) + 0xc0000000 = 0xbc100000 , which is wrong. it should be : 0xc0000000 + 0x100000 = 0xc0100000 On platforms which support AMP, like PPC_47x (based on 44x), the kernel could be loaded at highmem. Hence we cannot always depend on the compile time constants for mapping. Here are the possible solutions: 1) Update kernstart_addr(PHSYICAL_START) to match the Physical address of compile time KERNELBASE value, instead of the actual Physical_Address(_stext). The disadvantage is that we may break other users of PHYSICAL_START. They could be replaced with __pa(_stext). 2) Redefine __va() & __pa() with relocation offset #ifdef CONFIG_RELOCATABLE_PPC32 #define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) - PHYSICAL_START + (KERNELBASE + RELOC_OFFSET))) #define __pa(x) ((unsigned long)(x) + PHYSICAL_START - (KERNELBASE + RELOC_OFFSET)) #endif where, RELOC_OFFSET could be a) A variable, say relocation_offset (like kernstart_addr), updated at boot time. This impacts performance, as we have to load an additional variable from memory. OR b) #define RELOC_OFFSET ((PHYSICAL_START & PPC_PIN_SIZE_OFFSET_MASK) - \ (KERNELBASE & PPC_PIN_SIZE_OFFSET_MASK)) This introduces more calculations for doing the translation. 3) Redefine __va() & __pa() with a new variable i.e, #define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) + VIRT_PHYS_OFFSET)) where VIRT_PHYS_OFFSET : #ifdef CONFIG_RELOCATABLE_PPC32 #define VIRT_PHYS_OFFSET virt_phys_offset #else #define VIRT_PHYS_OFFSET (KERNELBASE - PHYSICAL_START) #endif /* CONFIG_RELOCATABLE_PPC32 */ where virt_phy_offset is updated at runtime to : Effective KERNELBASE - kernstart_addr. Taking our example, above: virt_phys_offset = effective_kernelstart_vaddr - kernstart_addr = 0xc0400000 - 0x400000 = 0xc0000000 and __va(0x100000) = 0xc0000000 + 0x100000 = 0xc0100000 which is what we want. I have implemented (3) in the following patch which has same cost of operation as the existing one. I have tested the patches on 440x platforms only. However this should work fine for PPC_47x also, as we only depend on the runtime address and the current TLB XLAT entry for the startup code, which is available in r25. I don't have access to a 47x board yet. So, it would be great if somebody could test this on 47x. Signed-off-by: Suzuki K. Poulose Cc: Benjamin Herrenschmidt Cc: Kumar Gala Cc: linuxppc-dev Signed-off-by: Josh Boyer

memblock: s/memblock_analyze()/memblock_allow_resize()/ and update users

2011-12-08T18:22:08+00:00

The only function of memblock_analyze() is now allowing resize of memblock region arrays. Rename it to memblock_allow_resize() and update its users. * The following users remain the same other than renaming. arm/mm/init.c::arm_memblock_init() microblaze/kernel/prom.c::early_init_devtree() powerpc/kernel/prom.c::early_init_devtree() openrisc/kernel/prom.c::early_init_devtree() sh/mm/init.c::paging_init() sparc/mm/init_64.c::paging_init() unicore32/mm/init.c::uc32_memblock_init() * In the following users, analyze was used to update total size which is no longer necessary. powerpc/kernel/machine_kexec.c::reserve_crashkernel() powerpc/kernel/prom.c::early_init_devtree() powerpc/mm/init_32.c::MMU_init() powerpc/mm/tlb_nohash.c::__early_init_mmu() powerpc/platforms/ps3/mm.c::ps3_mm_add_memory() powerpc/platforms/embedded6xx/wii.c::wii_memory_fixups() sh/kernel/machine_kexec.c::reserve_crashkernel() * x86/kernel/e820.c::memblock_x86_fill() was directly setting memblock_can_resize before populating memblock and calling analyze afterwards. Call memblock_allow_resize() before start populating. memblock_can_resize is now static inside memblock.c. Signed-off-by: Tejun Heo Cc: Benjamin Herrenschmidt Cc: Yinghai Lu Cc: Russell King Cc: Michal Simek Cc: Paul Mundt Cc: "David S. Miller" Cc: Guan Xuetao Cc: "H. Peter Anvin"