From 19f5465e823858a2f0b0e9a92e52816ba3ee70bb Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Mon, 8 Dec 2008 19:34:55 -0800 Subject: powerpc/fsl-booke: Don't hard-code size of struct tlbcam Some assembly code in head_fsl_booke.S hard-coded the size of struct tlbcam to 20 when it indexed the TLBCAM table. Anyone changing the size of struct tlbcam would not know to expect that. The kernel already has a system to get the size of C structures into assembly language files, asm-offsets, so let's use it. The definition of the struct gets moved to a header, so that asm-offsets.c can include it. Signed-off-by: Trent Piepho Signed-off-by: Kumar Gala --- arch/powerpc/kernel/asm-offsets.c | 7 +++++++ arch/powerpc/kernel/head_fsl_booke.S | 2 +- 2 files changed, 8 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/kernel') diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 661d07d..06958da 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -56,6 +56,10 @@ #include "head_booke.h" #endif +#if defined(CONFIG_FSL_BOOKE) +#include "../mm/mmu_decl.h" +#endif + int main(void) { DEFINE(THREAD, offsetof(struct task_struct, thread)); @@ -384,6 +388,9 @@ int main(void) DEFINE(PGD_T_LOG2, PGD_T_LOG2); DEFINE(PTE_T_LOG2, PTE_T_LOG2); #endif +#ifdef CONFIG_FSL_BOOKE + DEFINE(TLBCAM_SIZE, sizeof(struct tlbcam)); +#endif return 0; } diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S index 11b549ac..805f28d 100644 --- a/arch/powerpc/kernel/head_fsl_booke.S +++ b/arch/powerpc/kernel/head_fsl_booke.S @@ -909,7 +909,7 @@ KernelSPE: _GLOBAL(loadcam_entry) lis r4,TLBCAM@ha addi r4,r4,TLBCAM@l - mulli r5,r3,20 + mulli r5,r3,TLBCAM_SIZE add r3,r5,r4 lwz r4,0(r3) mtspr SPRN_MAS0,r4 -- cgit v1.1 From 6fd8be4bf72879b3039654388e985cabf8449af5 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Mon, 8 Dec 2008 19:34:56 -0800 Subject: powerpc/fsl-booke: Remove num_tlbcam_entries This is a global variable defined in fsl_booke_mmu.c with a value that gets initialized in assembly code in head_fsl_booke.S. It's never used. If some code ever does want to know the number of entries in TLB1, then "numcams = mfspr(SPRN_TLB1CFG) & 0xfff", is a whole lot simpler than a global initialized during kernel boot from assembly. Signed-off-by: Trent Piepho Signed-off-by: Kumar Gala --- arch/powerpc/kernel/head_fsl_booke.S | 4 ---- 1 file changed, 4 deletions(-) (limited to 'arch/powerpc/kernel') diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S index 805f28d..2f32720 100644 --- a/arch/powerpc/kernel/head_fsl_booke.S +++ b/arch/powerpc/kernel/head_fsl_booke.S @@ -389,10 +389,6 @@ skpinv: addi r6,r6,1 /* Increment */ #endif #endif - mfspr r3,SPRN_TLB1CFG - andi. r3,r3,0xfff - lis r4,num_tlbcam_entries@ha - stw r3,num_tlbcam_entries@l(r4) /* * Decide what sort of machine this is and initialize the MMU. */ -- cgit v1.1 From e16459c6b7e9c1390020a3e2a033b5383d1c4f3b Mon Sep 17 00:00:00 2001 From: Milton Miller Date: Fri, 2 Jan 2009 10:46:04 +0000 Subject: powerpc: Make dummy section a valid note header We are declaring the dummy section (used to work around a binutils bug) as PT_NOTE, but we don't have enough bytes for it to be a valid note header, and kexec userspace complains: Warning: Elf Note name is not null terminated Warning: append= option is not passed. Using the first kernel root partition Warning: Elf Note name is not null terminated Instead of using the arbitray value 0xf177 (aka "fill"), declare a no-name no-description note of type 0. Signed-off-by: Milton Miller Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/vmlinux.lds.S | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/kernel') diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S index 47bf15c..161b9b9 100644 --- a/arch/powerpc/kernel/vmlinux.lds.S +++ b/arch/powerpc/kernel/vmlinux.lds.S @@ -87,7 +87,9 @@ SECTIONS /* The dummy segment contents for the bug workaround mentioned above near PHDRS. */ .dummy : AT(ADDR(.dummy) - LOAD_OFFSET) { - LONG(0xf177) + LONG(0) + LONG(0) + LONG(0) } :kernel :dummy /* -- cgit v1.1 From 66c721e184e594d5761c5db804ade08fab81930d Mon Sep 17 00:00:00 2001 From: Milton Miller Date: Fri, 2 Jan 2009 10:46:15 +0000 Subject: powerpc/kexec: Check crash_base for relocatable kernel Enforce that the crash kernel region never overlaps the current kernel, as it will be written directly on kexec load. Also, default to the previous KDUMP_KERNELBASE if the start is 0. Other architectures (x86, ia64) state that specifying the start address 0 (or omitting it) will result in the kernel allocating it. Before the relocatable patch in 2.6.28, powerpc would adjust any other start value to the hardcoded KDUMP_KERNELBASE of 32M. Signed-off-by: Milton Miller Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/machine_kexec.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'arch/powerpc/kernel') diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c index b3abebb..d59e2b1 100644 --- a/arch/powerpc/kernel/machine_kexec.c +++ b/arch/powerpc/kernel/machine_kexec.c @@ -93,10 +93,35 @@ void __init reserve_crashkernel(void) KDUMP_KERNELBASE); crashk_res.start = KDUMP_KERNELBASE; +#else + if (!crashk_res.start) { + /* + * unspecified address, choose a region of specified size + * can overlap with initrd (ignoring corruption when retained) + * ppc64 requires kernel and some stacks to be in first segemnt + */ + crashk_res.start = KDUMP_KERNELBASE; + } + + crash_base = PAGE_ALIGN(crashk_res.start); + if (crash_base != crashk_res.start) { + printk("Crash kernel base must be aligned to 0x%lx\n", + PAGE_SIZE); + crashk_res.start = crash_base; + } + #endif crash_size = PAGE_ALIGN(crash_size); crashk_res.end = crashk_res.start + crash_size - 1; + /* The crash region must not overlap the current kernel */ + if (overlaps_crashkernel(__pa(_stext), _end - _stext)) { + printk(KERN_WARNING + "Crash kernel can not overlap current kernel\n"); + crashk_res.start = crashk_res.end = 0; + return; + } + /* Crash kernel trumps memory limit */ if (memory_limit && memory_limit <= crashk_res.end) { memory_limit = crashk_res.end + 1; -- cgit v1.1 From fe333321e2a71f706b794d55b6a3dcb5ab240f65 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Tue, 6 Jan 2009 14:26:03 +0000 Subject: powerpc: Change u64/s64 to a long long integer type Convert arch/powerpc/ over to long long based u64: -#ifdef __powerpc64__ -# include -#else -# include -#endif +#include This will avoid reoccuring spurious warnings in core kernel code that comes when people test on their own hardware. (i.e. x86 in ~98% of the cases) This is what x86 uses and it generally helps keep 64-bit code 32-bit clean too. [Adjusted to not impact user mode (from paulus) - sfr] Signed-off-by: Ingo Molnar Signed-off-by: Stephen Rothwell Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/dma-iommu.c | 4 ++-- arch/powerpc/kernel/iommu.c | 12 ++++++------ arch/powerpc/kernel/lparcfg.c | 10 +++++----- arch/powerpc/kernel/setup_64.c | 6 +++--- 4 files changed, 16 insertions(+), 16 deletions(-) (limited to 'arch/powerpc/kernel') diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c index 14183af..2983ada 100644 --- a/arch/powerpc/kernel/dma-iommu.c +++ b/arch/powerpc/kernel/dma-iommu.c @@ -79,10 +79,10 @@ static int dma_iommu_dma_supported(struct device *dev, u64 mask) "Warning: IOMMU offset too big for device mask\n"); if (tbl) printk(KERN_INFO - "mask: 0x%08lx, table offset: 0x%08lx\n", + "mask: 0x%08llx, table offset: 0x%08lx\n", mask, tbl->it_offset); else - printk(KERN_INFO "mask: 0x%08lx, table unavailable\n", + printk(KERN_INFO "mask: 0x%08llx, table unavailable\n", mask); return 0; } else diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index 1bfa706..fd51578 100644 --- a/arch/powerpc/kernel/iommu.c +++ b/arch/powerpc/kernel/iommu.c @@ -239,12 +239,12 @@ static void __iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr, if (printk_ratelimit()) { printk(KERN_INFO "iommu_free: invalid entry\n"); printk(KERN_INFO "\tentry = 0x%lx\n", entry); - printk(KERN_INFO "\tdma_addr = 0x%lx\n", (u64)dma_addr); - printk(KERN_INFO "\tTable = 0x%lx\n", (u64)tbl); - printk(KERN_INFO "\tbus# = 0x%lx\n", (u64)tbl->it_busno); - printk(KERN_INFO "\tsize = 0x%lx\n", (u64)tbl->it_size); - printk(KERN_INFO "\tstartOff = 0x%lx\n", (u64)tbl->it_offset); - printk(KERN_INFO "\tindex = 0x%lx\n", (u64)tbl->it_index); + printk(KERN_INFO "\tdma_addr = 0x%llx\n", (u64)dma_addr); + printk(KERN_INFO "\tTable = 0x%llx\n", (u64)tbl); + printk(KERN_INFO "\tbus# = 0x%llx\n", (u64)tbl->it_busno); + printk(KERN_INFO "\tsize = 0x%llx\n", (u64)tbl->it_size); + printk(KERN_INFO "\tstartOff = 0x%llx\n", (u64)tbl->it_offset); + printk(KERN_INFO "\tindex = 0x%llx\n", (u64)tbl->it_index); WARN_ON(1); } return; diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c index d051e8c..182e0f6 100644 --- a/arch/powerpc/kernel/lparcfg.c +++ b/arch/powerpc/kernel/lparcfg.c @@ -240,7 +240,7 @@ static void parse_ppp_data(struct seq_file *m) if (rc) return; - seq_printf(m, "partition_entitled_capacity=%ld\n", + seq_printf(m, "partition_entitled_capacity=%lld\n", ppp_data.entitlement); seq_printf(m, "group=%d\n", ppp_data.group_num); seq_printf(m, "system_active_processors=%d\n", @@ -265,7 +265,7 @@ static void parse_ppp_data(struct seq_file *m) ppp_data.unallocated_weight); seq_printf(m, "capacity_weight=%d\n", ppp_data.weight); seq_printf(m, "capped=%d\n", ppp_data.capped); - seq_printf(m, "unallocated_capacity=%ld\n", + seq_printf(m, "unallocated_capacity=%lld\n", ppp_data.unallocated_entitlement); } @@ -509,10 +509,10 @@ static ssize_t update_ppp(u64 *entitlement, u8 *weight) } else return -EINVAL; - pr_debug("%s: current_entitled = %lu, current_weight = %u\n", + pr_debug("%s: current_entitled = %llu, current_weight = %u\n", __func__, ppp_data.entitlement, ppp_data.weight); - pr_debug("%s: new_entitled = %lu, new_weight = %u\n", + pr_debug("%s: new_entitled = %llu, new_weight = %u\n", __func__, new_entitled, new_weight); retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight); @@ -558,7 +558,7 @@ static ssize_t update_mpp(u64 *entitlement, u8 *weight) pr_debug("%s: current_entitled = %lu, current_weight = %u\n", __func__, mpp_data.entitled_mem, mpp_data.mem_weight); - pr_debug("%s: new_entitled = %lu, new_weight = %u\n", + pr_debug("%s: new_entitled = %llu, new_weight = %u\n", __func__, new_entitled, new_weight); rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight); diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index d8bd216..2d34196 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -434,8 +434,8 @@ void __init setup_system(void) printk("Starting Linux PPC64 %s\n", init_utsname()->version); printk("-----------------------------------------------------\n"); - printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size); - printk("physicalMemorySize = 0x%lx\n", lmb_phys_mem_size()); + printk("ppc64_pft_size = 0x%llx\n", ppc64_pft_size); + printk("physicalMemorySize = 0x%llx\n", lmb_phys_mem_size()); if (ppc64_caches.dline_size != 0x80) printk("ppc64_caches.dcache_line_size = 0x%x\n", ppc64_caches.dline_size); @@ -493,7 +493,7 @@ static void __init emergency_stack_init(void) * bringup, we need to get at them in real mode. This means they * must also be within the RMO region. */ - limit = min(0x10000000UL, lmb.rmo_size); + limit = min(0x10000000ULL, lmb.rmo_size); for_each_possible_cpu(i) { unsigned long sp; -- cgit v1.1 From 9477e455b4b3ded3e7add8c96d8293105947eaac Mon Sep 17 00:00:00 2001 From: Stephen Rothwell Date: Tue, 6 Jan 2009 14:27:38 +0000 Subject: powerpc: Cleanup from l64 to ll64 change: arch code Signed-off-by: Stephen Rothwell Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/pci_64.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/powerpc/kernel') diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c index 586962f..ea8eda8 100644 --- a/arch/powerpc/kernel/pci_64.c +++ b/arch/powerpc/kernel/pci_64.c @@ -470,7 +470,7 @@ int __devinit pcibios_map_io_space(struct pci_bus *bus) if (bus->self) { pr_debug("IO mapping for PCI-PCI bridge %s\n", pci_name(bus->self)); - pr_debug(" virt=0x%016lx...0x%016lx\n", + pr_debug(" virt=0x%016llx...0x%016llx\n", bus->resource[0]->start + _IO_BASE, bus->resource[0]->end + _IO_BASE); return 0; @@ -502,7 +502,7 @@ int __devinit pcibios_map_io_space(struct pci_bus *bus) hose->io_base_phys - phys_page); pr_debug("IO mapping for PHB %s\n", hose->dn->full_name); - pr_debug(" phys=0x%016lx, virt=0x%p (alloc=0x%p)\n", + pr_debug(" phys=0x%016llx, virt=0x%p (alloc=0x%p)\n", hose->io_base_phys, hose->io_base_virt, hose->io_base_alloc); pr_debug(" size=0x%016lx (alloc=0x%016lx)\n", hose->pci_io_size, size_page); @@ -517,7 +517,7 @@ int __devinit pcibios_map_io_space(struct pci_bus *bus) hose->io_resource.start += io_virt_offset; hose->io_resource.end += io_virt_offset; - pr_debug(" hose->io_resource=0x%016lx...0x%016lx\n", + pr_debug(" hose->io_resource=0x%016llx...0x%016llx\n", hose->io_resource.start, hose->io_resource.end); return 0; -- cgit v1.1 From fc7a9feb9c9df50ed6d115514b48c49e8511a4de Mon Sep 17 00:00:00 2001 From: Nathan Lynch Date: Fri, 9 Jan 2009 13:12:44 +0000 Subject: powerpc/cacheinfo: Rename cache_dir per-cpu variable The per_cpu__ prefix on DECLARE_PER_CPU'd variables is going away; rename cache_dir to cache_dir_pcpu. Signed-off-by: Nathan Lynch Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/cacheinfo.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'arch/powerpc/kernel') diff --git a/arch/powerpc/kernel/cacheinfo.c b/arch/powerpc/kernel/cacheinfo.c index b33f041..bb37b1d 100644 --- a/arch/powerpc/kernel/cacheinfo.c +++ b/arch/powerpc/kernel/cacheinfo.c @@ -113,7 +113,7 @@ struct cache { struct cache *next_local; /* next cache of >= level */ }; -static DEFINE_PER_CPU(struct cache_dir *, cache_dir); +static DEFINE_PER_CPU(struct cache_dir *, cache_dir_pcpu); /* traversal/modification of this list occurs only at cpu hotplug time; * access is serialized by cpu hotplug locking @@ -468,9 +468,9 @@ static struct cache_dir *__cpuinit cacheinfo_create_cache_dir(unsigned int cpu_i cache_dir->kobj = kobj; - WARN_ON_ONCE(per_cpu(cache_dir, cpu_id) != NULL); + WARN_ON_ONCE(per_cpu(cache_dir_pcpu, cpu_id) != NULL); - per_cpu(cache_dir, cpu_id) = cache_dir; + per_cpu(cache_dir_pcpu, cpu_id) = cache_dir; return cache_dir; err: @@ -820,13 +820,13 @@ void cacheinfo_cpu_offline(unsigned int cpu_id) /* Prevent userspace from seeing inconsistent state - remove * the sysfs hierarchy first */ - cache_dir = per_cpu(cache_dir, cpu_id); + cache_dir = per_cpu(cache_dir_pcpu, cpu_id); /* careful, sysfs population may have failed */ if (cache_dir) remove_cache_dir(cache_dir); - per_cpu(cache_dir, cpu_id) = NULL; + per_cpu(cache_dir_pcpu, cpu_id) = NULL; /* clear the CPU's bit in its cache chain, possibly freeing * cache objects */ -- cgit v1.1 From c478b58135e6c9b49c8b80bff8ef910f2ba9b313 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Sun, 11 Jan 2009 19:03:45 +0000 Subject: powerpc/powermac: Fix occasional SMP boot failure The PowerMac kernel occasionally fails to bring up the secondary CPUs on SMP, the trigger factor seem to be fairly random and related to location of code and data. This appears to be due to the initial loading of the TOC value by the secondary processor which now happens before we clear HID4:RM_CI (Real Mode Cache Invalidate). This bit should really be cleared before we do any load or store other than fetching code. This fix works based on the assumption that all SMP 64-bit PowerMacs use variants of the 970, which fortunately is true, by explicitely clearing that bit, adding an slbia for good measure as RM_CI mode is known to create bogus ERAT entries. I also removed some spurrious debug output that was left enabled by mistake while at it. Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/head_64.S | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'arch/powerpc/kernel') diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index b4bcf5a..ebaedaf 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -1518,6 +1518,15 @@ _GLOBAL(pmac_secondary_start) /* turn on 64-bit mode */ bl .enable_64b_mode + li r0,0 + mfspr r3,SPRN_HID4 + rldimi r3,r0,40,23 /* clear bit 23 (rm_ci) */ + sync + mtspr SPRN_HID4,r3 + isync + sync + slbia + /* get TOC pointer (real address) */ bl .relative_toc -- cgit v1.1 From 5597b25c300eeaf43392f399990d3f3027a9b779 Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Thu, 8 Jan 2009 18:11:56 -0600 Subject: powerpc/e500mc: Doorbells need to be taken w/exceptions disabled We use Doorbell interrupts for IPIs and thus we need to make sure we aren't interrupted in the process of processing the IPI. Signed-off-by: Kumar Gala Acked-by: Dave Liu --- arch/powerpc/kernel/head_fsl_booke.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/powerpc/kernel') diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S index 2f32720..36ffb35 100644 --- a/arch/powerpc/kernel/head_fsl_booke.S +++ b/arch/powerpc/kernel/head_fsl_booke.S @@ -707,7 +707,7 @@ interrupt_base: EXCEPTION(0x2060, PerformanceMonitor, performance_monitor_exception, EXC_XFER_STD) #ifdef CONFIG_PPC_E500MC - EXCEPTION(0x2070, Doorbell, unknown_exception, EXC_XFER_EE) + EXCEPTION(0x2070, Doorbell, unknown_exception, EXC_XFER_STD) #endif /* Debug Interrupt */ -- cgit v1.1 From b60c31d85a2a2f1a9c8623f1fb56e2688aa1e2b1 Mon Sep 17 00:00:00 2001 From: Michael Neuling Date: Wed, 14 Jan 2009 13:42:41 +0000 Subject: powerpc: Get the number of SLBs from "slb-size" property The PAPR says that the property for specifying the number of SLBs should be called "slb-size". We currently only look for "ibm,slb-size" because this is what firmware actually presents. This patch makes us look for the "slb-size" property as well and in preference to the "ibm,slb-size". This should future proof us if firmware changes to match PAPR. Signed-off-by: Michael Neuling Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/prom.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/powerpc/kernel') diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index c09cffa..f00f831 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -590,6 +590,11 @@ static void __init check_cpu_slb_size(unsigned long node) { u32 *slb_size_ptr; + slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL); + if (slb_size_ptr != NULL) { + mmu_slb_size = *slb_size_ptr; + return; + } slb_size_ptr = of_get_flat_dt_prop(node, "ibm,slb-size", NULL); if (slb_size_ptr != NULL) { mmu_slb_size = *slb_size_ptr; -- cgit v1.1