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2012-07-14Fix Xen boot at linear address 0xC0000000Samuel Thibault
* i386/intel/pmap.c (pmap_bootstrap): Interate over linear addresses and compute l3 and l2 offsets from it instead of assuming nul l3 offset.
2012-05-05Offset kernel addresses by 3GiBSamuel Thibault
This permits better trace support in kdb. * i386/i386/vm_param.h (VM_MIN_KERNEL_ADDRESS): Set to 0xC0000000 * i386/Makefrag.am (_START): Set to 0xC0100000.
2012-05-05Document how to offset the kernel to get better debuggingSamuel Thibault
* i386/i386/vm_param.h (VM_MIN_KERNEL_ADDRESS): Document that it can be changed, but _START has to be offset too. (INIT_VM_MIN_KERNEL_ADDRESS): Document that it should remain 0.
2012-04-06Check hyp_stack_switch returnSamuel Thibault
* i386/i386/pcb.c (switch_ktss): Check value returned by hyp_stack_switch.
2012-03-24Fix Xen boot after c74adfeSamuel Thibault
* i386/Makefrag.am (_START_MAP): Define symbol to 0x100000. * i386/xen/Makefrag.am (_START_MAP): Define symbol to 0xC0000000. * i386/ldscript: Use _START_MAP instead of hardcoding 0x100000.
2012-03-24Relocate kernel at bootupSamuel Thibault
Grub is not able to map us at high addresses. We can however make it load us at low addresses (through the linker script mapping), then use segmentation to move ourselves to high addresses, and switch to C which uses high addresses (through _START definition). * i386/ldscript: Force mapping kernel at 0x100000, regardless of the value of _START. * i386/i386at/boothdr.S (boot_entry): Set up initial segments to project the bootstrap linear space to high addresses.
2012-03-24Make sure BIOS area is mapped in kernel threadsSamuel Thibault
* i386/i386at/model_dep.c (i386at_init): Map BIOS memory at 0. * i386/intel/pmap.c (pmap_create): Do not map BIOS memory in user tasks.
2012-03-24Separate INIT_VM_MIN_KERNEL_ADDRESS from VM_MIN_KERNEL_ADDRESSSamuel Thibault
The former is the initial value set by the bootloader. It may not be the same as what Mach will set up. * i386/i386/vm_param.h (INIT_VM_MIN_KERNEL_ADDRESS): New macro. * i386/i386at/model_dep.c (i386at_init): Use INIT_VM_MIN_KERNEL_ADDRESS instead of VM_MIN_KERNEL_ADDRESS.
2012-03-24Add missing phystokv/kvtophys callsSamuel Thibault
* i386/i386/vm_param.h [!MACH_XEN]: Do not include <xen/public/xen.h>. * i386/i386at/model_dep.c (init_alloc_aligned): Use phystokv to compare physical memory addresses with kernel start, end, and symbol table. * i386/intel/pmap.c (pmap_enter): Use kvtophys to convert ptp pointer to pte entry. * linux/dev/init/main.c (alloc_contig_mem, linux_init): Use phystokv to convert allocated pages to virtual pointer. * linux/src/include/asm-i386/io.h: Include <machine/vm_param.h>. (virt_to_phys): Call _kvtophys. (phys_to_virt): Call phystokv. * linux/src/include/linux/compatmac.h: Include <asm/io.h>. (ioremap): Use phys_to_virt to convert physical address to virtual pointer. (my_iounmap): Likewise. * linux/dev/include/asm-i386/page.h: Include <mach/vm_param.h>. (PAGE_SHIFT, PAGE_SIZE, PAGE_MASK): Remove macros. * linux/src/drivers/scsi/ncr53c8xx.c (vm_size_t): Remove type. * linux/dev/glue/net.c: Include <machine/vm_param.h> (device_write): Call phystokv to convert from physical page address to virtual pointer. * linux/dev/glue/block.c (alloc_buffer, free_buffer, rdwr_full): Likewise.
2012-03-24Fix wrap-around in pmap bootstrapSamuel Thibault
* i386/intel/pmap.c (pmap_bootstrap): Check against `va' wrap around 0xffffffff.
2012-03-23Fix boot with big values of _startSamuel Thibault
When _start is not close to 0, just using init_alloc_aligned() is not enough to know how much should be duplicated between linear and virtual mappings. Just mapping everything that can be is not very costly and should just work when it can work. * i386/i386at/model_dep.c (i386at_init) [VM_MIN_KERNEL_ADDRESS != LINEAR_MIN_KERNEL_ADDRESS]: Extend `nb_direct' to VM_MIN_KERNEL_ADDRESS - LINEAR_MIN_KERNEL_ADDRESS.
2012-03-22Refer to `PFN_LIST' on Xen only.Ludovic Courtès
* i386/i386/i386asm.sym (PFN_LIST): Enclose in #ifdef MACH_XEN. Thanks to Samuel Thibault for the suggestion.
2012-03-20Use long typesSamuel Thibault
* ddb/db_examine.c (db_xcdump): Do not cast addr before passing to db_read_bytes. * ddb/db_macro.c (db_arg_variable): Return long. * ddb/db_macro.h (db_arg_variable): Likewise. * ddb/db_sym.c (db_maxoff): Set type to unsigned long. * ddb/db_task_thread.c (db_set_default_thread, db_get_task_thread): Return long. * ddb/db_variables.h (db_variable): Make fcn function field to return long. (FCN_NULL): Make function type return long. * i386/i386/db_interface.c (int_regs): Set field sizes to long. * i386/i386/db_machdep.h (db_expr_t): Set type to long. * i386/i386/db_trace.c (db_i386_reg_value): Return long. Use long types. (i386_frame, i386_kregs, interrupt_frame, db_nextframe): Set field sizes to long. (db_regs, i386_kregs): Use long * pointers. (db_lookup_i386_kreg): Return long *. (db_numargs, db_nextframe, db_stack_trace_cmd, db_i386_stack_trace): Use long types. * i386/i386/debug_i386.c (dump_ss): Fix format. * i386/i386/ktss.c (ktss_init): Use long type. * i386/i386/pcb.c (set_user_regs): Likewise. * i386/i386/thread.h (i386_saved_state, v86_segs, i386_kernel_state, i386_interrupt_state): Set field sizes to long. * i386/i386/trap.c (kernel_trap, user_trap): Fix formats. * kern/ast.h (ast_t): Set type to long. * kern/boot_script.c (create_task, resume_task, prompt_resume_task, boot_script_set_variable): Use long types. * kern/boot_script.h (boot_script_set_variable): Use long type. * kern/bootstrap.c (bootstrap_create): Pass long type. * kern/lock.c (simple_lock, simple_lock_try): Use long type. * linux/dev/kernel/softirq.c (linux_soft_intr): Fix format.
2012-03-20Make xchgl arch-neutralSamuel Thibault
* i386/i386/xen.h (xchgl): Use xchg instruction instead of xchgl, so the assembler can detect unsigned long size.
2012-03-20Use compiler defined __i386__ symbol instead of use defined i386Guillem Jover
* i386/configfrag.ac (i386): Remove definition. * i386/intel/pmap.c (pmap_update_interrupt): Rename i386 to __i386__. * i386/intel/pmap.h: Likewise. * kern/debug.c (Debugger): Likewise. * kern/lock.c (simple_lock, simple_lock_try, db_show_all_slocks): Likewise.
2012-03-20Match type for count with tty_get_status and tty_set_statusGuillem Jover
* i386/i386at/com.c (comgetstat): Use natural_t instead of `unsigned int'. (comsetstat): Likewise. * i386/i386at/kd.c (kdgetstat, kdsetstat): Likewise. * i386/i386at/lpr.c (lprgetstat, lprsetstat): Likewise.
2012-03-19Use unsigned int for ELF 32bit valuesSamuel Thibault
* i386/include/mach/i386/exec/elf.h (Elf32_Addr, Elf32_Off, Elf32_Sword, Elf32_Word): Use int type instead of long.
2012-03-18Use unsigned long types for addressesSamuel Thibault
* i386/include/mach/i386/vm_param.h (i386_btop, i386_ptob, i386_round_page, i386_trunc_page): Cast to unsigned long.
2012-03-18Use unsigned long for registersSamuel Thibault
* i386/i386/proc_reg.h (get_eflags, get_esp, get_eflags, get_cr0, get_cr2, get_cr3, get_cr4): Return unsigned long type. (set_eflags, set_cr0, set_cr3, set_cr4): Take unsigned long type.
2012-03-18Do not hardcode structure offsetSamuel Thibault
* i386/i386/i386asm.sym (R_EDI): Define macro. * i386/i386/locore.S (t_page_fault): Use R_CR2-R_EDI instead of hardcoded 12.
2012-03-18Set Xen kernel virtual address to 0xC0000000Samuel Thibault
That makes the virtual addressing equal to linear addressing, thus optimizing some computations away. * i386/i386/vm_param.h (VM_MIN_KERNEL_ADDRESS) [MACH_XEN]: Set to 0xC0000000UL. * i386/xen/Makefrag.am (gnumach_LINKFLAGS): Set _START to 0xC0000000. * i386/xen/xen_boothdr.S (VIRT_BASE, ELF_PADDR_OFFSET): Set to 0xC0000000.
2012-03-18Fix access above 4GiB in bootstrap page tableSamuel Thibault
* i386/intel/pmap.c (pmap_set_page_readonly_init) [PAE]: Access the bootstrap dirbase with PTEMASK (1 page) instead of PDEMASK (4 pages) through pmap_pde.
2012-03-14Simplify splxSamuel Thibault
* i386/i386/spl.S (splx): Use S_ARG0 instead of reimplementing it.
2012-03-14Stick to binutils ELF scriptsSamuel Thibault
* i386/ldscript: Reformat to follow binutils version
2012-03-14Fix PAE page frame number mask.Samuel Thibault
* i386/intel/pmap.h (INTEL_PTE_PFN): Keep only 47bits, others are not usable.
2012-03-14Fix Xen bootstrap at virtual address above 1GiBSamuel Thibault
* i386/intel/pmap.h (lin2pdpnum): New macro. * i386/intel/pmap.c (pmap_set_page_readonly_init): Use lin2pdpnum macro instead of hardcoding 0.
2012-03-14Simplify i386at_initSamuel Thibault
* i386/i386at/model_dep.c (i386at_init): Do not copy linear into virtual kernel mapping when they are equal, and do not drop the former either. Use the function `i' variable.
2012-03-14Simplify kvtophysSamuel Thibault
* i386/i386/phys.c (kvtophys): Use pte_to_pa macro instead of reimplementing it.
2012-03-09Use unsigned long for addresses and sizesSamuel Thibault
TODO: remonter formats * i386/include/mach/i386/vm_types.h (vm_offset_t): Define to unsigned long. (signed32_t): Define to signed int. (unsigned32_t): Define to unsigned int. * i386/include/mach/sa/stdarg.h (__va_size): Use sizeof(unsigned long)-1 instead of 3. * include/mach/port.h (mach_port_t): Define to vm_offset_t instead of natural_t. * include/sys/types.h (size_t): Define to unsigned long instead of natural_t. * linux/src/include/asm-i386/posix_types.h (__kernel_size_t): Define to unsigned long. (__kernel_ssize_t): Define to long. * linux/src/include/linux/stddef.h (size_t): Define to unsigned long. * device/dev_pager.c (dev_pager_hash): Cast port to vm_offset_t insted of natural_t. (device_pager_data_request): Fix format. * device/ds_routines.c (ds_no_senders): Fix format. * i386/i386/io_map.c (io_map): Likewise. * i386/i386at/autoconf.c (take_dev_irq): Likewise. * i386/i386at/com.c (comattach): Likewise. * i386/i386at/lpr.c (lprattach): Likewise. * i386/i386at/model_dep.c (mem_size_init, mem_size_init, c_boot_entry): Likewise. * i386/intel/pmap.c (pmap_enter): Likewise. * ipc/ipc_notify.c (ipc_notify_port_deleted, ipc_notify_msg_accepted, ipc_notify_dead_name): Likewise. * ipc/mach_port.c (mach_port_destroy, mach_port_deallocate): Likewise. * kern/ipc_kobject.c (ipc_kobject_destroy): Likewise. * kern/slab.c (kalloc_init): Likewise. * vm/vm_fault.c (vm_fault_page): Likewise. * vm/vm_map.c (vm_map_pmap_enter): Likewise. * xen/block.c (device_read): Likewise. * device/net_io.c (bpf_match): Take unsigned long * instead of unsigned int *. (bpf_do_filter): Make mem unsigned long instead of long. * i386/i386/ktss.c (ktss_init): Cast pointer to unsigned long instead of unsigned. * i386/i386/pcb.c (stack_attach, switch_ktss): Cast pointers to long instead of int. * i386/i386/trap.c (dump_ss): Likewise. * ipc/ipc_hash.c (IH_LOCAL_HASH): Cast object to vm_offset_t. * ipc/mach_msg.c (mach_msg_receive, mach_msg_receive_continue): Cast kmsg to vm_offset_t instead of natural_t. * kern/pc_sample.c (take_pc_sample): Cast to vm_offset_t instead of natural_t. * kern/boot_script.c (sym, arg): Set type of `val' field to long instead of int. (create_task, builtin_symbols, boot_script_parse_line, boot_script_define_function): Cast to long instead of int. * kern/bootstrap.c (bootstrap_create): Likewise. * kern/sched_prim.c (decl_simple_lock_data): Likewise. * kern/printf.c (vsnprintf): Set size type to size_t. * kern/printf.h (vsnprintf): Likewise. * vm/vm_map.h (kentry_data_size): Fix type to vm_size_t. * vm/vm_object.c (vm_object_pmap_protect_by_page): Fix size parameter type to vm_size_t.
2012-03-03Set default serial parameters to 8N1 instead of 7E1Gabriele Giacone
* i386/i386at/com.c (comcninit): Set LINE_CTL register to i8BITS instead of i7BITS|iPEN.
2012-02-19Fix format for string printSamuel Thibault
* i386/i386at/model_dep.c (c_boot_entry): Use %s format for printing a mere string, not the string.
2012-01-28Merge branch 'master' into master-slabSamuel Thibault
2011-12-29Fix typoSamuel Thibault
2011-12-17Remove arbitrary limits used by the zone systemRichard Braun
The zone allocator could limit the size of its zones to an arbitrary value set at zinit() time. There is no such parameter with the slab module. As a result of removing those limits, the kern/mach_param.h header becomes empty, and is simply removed altogether. * Makefrag.am (libkernel_a_SOURCES): Remove kern/mach_param.h. * i386/i386/fpu.c: Remove #include <kern/mach_param.h>. * i386/i386/machine_task.c: Likewise. * i386/i386/pcb.c: Likewise. * ipc/ipc_init.c: Likewise. (ipc_space_max): Remove variable. (ipc_tree_entry_max): Likewise. (ipc_port_max): Likewise. (ipc_pset_max): Likewise. * ipc/ipc_init.h (IPC_ZONE_TYPE): Remove macro. (ipc_space_max): Remove extern declaration. (ipc_tree_entry_max): Likewise. (ipc_port_max): Likewise. (ipc_pset_max): Likewise. * ipc/ipc_hash.c (ipc_hash_init): Don't use ipc_tree_entry_max to compute ipc_hash_global_size. * ipc/ipc_marequest.c: Remove #include <kern/mach_param.h>. (ipc_marequest_max): Remove variable. (ipc_marequest_init): Don't use ipc_marequest_max to compute ipc_marequest_size. (ipc_marequest_info): Return (unsigned int)-1 in maxp. * kern/act.c: Remove #include <kern/mach_param.h>. * kern/mach_clock.c: Likewise. * kern/priority.c: Likewise. * kern/task.c: Likewise. * kern/thread.c: Likewise. * vm/memory_object_proxy.c: Likewise. * vm/vm_fault.c: Likewise.
2011-12-17Fix kern/kalloc.h includesRichard Braun
* device/dev_pager.c: Remove #include <kern/kalloc.h>. * i386/i386/io_perm.c: Add #include <kern/kalloc.h>. * kern/bootstrap.c: Likewise. * kern/ipc_tt.c: Likewise. * kern/pc_sample.c: Likewise. * kern/processor.c: Likewise. * kern/server_loop.ch: Likewise. * kern/thread.c: Likewise. * linux/dev/glue/block.c: Likewise. * linux/dev/glue/net.c: Likewise. * vm/vm_map.c: Likewise. * xen/block.c: Likewise. * xen/net.c: Likewise. * xen/store.c: Likewise.
2011-12-17Adjust the kernel to use the slab allocatorRichard Braun
* device/dev_lookup.c: Replace zalloc header, types and function calls with their slab counterparts. * device/dev_pager.c: Likewise. * device/ds_routines.c: Likewise. * device/io_req.h: Likewise. * device/net_io.c: Likewise. * i386/i386/fpu.c: Likewise. * i386/i386/io_perm.c: Likewise. * i386/i386/machine_task.c: Likewise. * i386/i386/pcb.c: Likewise. * i386/i386/task.h: Likewise. * i386/intel/pmap.c: Likewise. * i386/intel/pmap.h: Remove #include <kernel/zalloc.h>. * include/mach_debug/mach_debug.defs (host_zone_info): Replace routine declaration with skip directive. (host_slab_info): New routine declaration. * include/mach_debug/mach_debug_types.defs (zone_name_t) (zone_name_array_t, zone_info_t, zone_info_array_t): Remove types. (cache_info_t, cache_info_array_t): New types. * include/mach_debug/mach_debug_types.h: Replace #include <mach_debug/zone_info.h> with <mach_debug/slab_info.h>. * ipc/ipc_entry.c: Replace zalloc header, types and function calls with their slab counterparts. * ipc/ipc_entry.h: Likewise. * ipc/ipc_init.c: Likewise. * ipc/ipc_marequest.c: Likewise. * ipc/ipc_object.c: Likewise. * ipc/ipc_object.h: Likewise. * ipc/ipc_space.c: Likewise. * ipc/ipc_space.h: Likewise. * ipc/ipc_table.c (kalloc_map): Remove extern declaration. * kern/act.c: Replace zalloc header, types and function calls with their slab counterparts. * kern/kalloc.h: Add #include <vm/vm_types.h>. (MINSIZE): Remove definition. (kalloc_map): Add extern declaration. (kget): Remove prototype. * kern/mach_clock.c: Adjust comment. * kern/processor.c: Replace zalloc header, types and function calls with their slab counterparts. * kern/startup.c: Remove #include <kernel/zalloc.h>. * kern/task.c: Replace zalloc header, types and function calls with their slab counterparts. * kern/thread.c: Likewise. * vm/memory_object_proxy.c: Likewise. * vm/vm_external.c: Likewise. * vm/vm_fault.c: Likewise. * vm/vm_init.c: Likewise. * vm/vm_map.c: Likewise. * vm/vm_object.c: Likewise. * vm/vm_page.h: Remove #include <kernel/zalloc.h>. * vm/vm_pageout.c: Replace zalloc header, types and function calls with their slab counterparts. * vm/vm_resident.c: Likewise. (zdata, zdata_size): Remove declarations. (vm_page_bootstrap): Don't steal memory for the zone system.
2011-12-17Import the slab allocatorRichard Braun
As it is intended to completely replace the zone allocator, remove it on the way. So long to the venerable code ! * Makefrag.am (libkernel_a_SOURCES): Add kern/slab.{c,h}, remove kern/kalloc.c and kern/zalloc.{c,h}. * configfrag.ac (SLAB_VERIFY, SLAB_USE_CPU_POOLS): Add defines. * i386/Makefrag.am (libkernel_a_SOURCES): Remove i386/i386/zalloc.h. * i386/configfrag.ac (CPU_L1_SHIFT): Remove define. * include/mach_debug/slab_info.h: New file. * kern/slab.c: Likewise. * kern/slab.h: Likewise. * i386/i386/zalloc.h: Remove file. * include/mach_debug/zone_info.h: Likewise. * kern/kalloc.c: Likewise. * kern/zalloc.c: Likewise. * kern/zalloc.h: Likewise.
2011-10-16Increase kmem area for the Xen case.Samuel Thibault
Kernel tacks are 4 pages in the Xen case, so we need more kmem space. * i386/i386/vm_param.h (VM_KERNEL_MAP_SIZE) [MACH_XEN]: Increase to 224MiB.
2011-09-12Remove unused [!MACH_KERNEL] driver codeGuillem Jover
Use «unifdef -DMACK_KERNEL=1» as a starting point, but only remove the code not exposed on public headers, the rest is needed to build properly from userland. * device/cons.c [!MACH_KERNEL]: Remove includes. [!MACH_KERNEL] (constty): Remove variable. (cninit, cnmaygetc) [MACH_KERNEL]: Remove preprocessor conditionals. [!MACH_KERNEL] (cnopen, cnclose, cnread, cnwrite, cnioctl, cnselect) (cncontrol): Remove functions. * device/cons.h (struct consdev) [MACH_KERNEL]: Remove preprocessor conditional. * device/kmsg.h [MACH_KERNEL]: Likewise. * i386/i386at/autoconf.c [!MACH_KERNEL]: Remove includes. * i386/i386at/kd_event.c [!MACH_KERNEL]: Likewise. [!MACH_KERNEL] (kbd_sel, kbdpgrp, kbdflag): Remove variables. [!MACH_KERNEL] (KBD_COLL, KBD_ASYNC, KBD_NBIO): Remove macros. (kbdopen, kbdclose, kbd_enqueue) [!MACH_KERNEL]: Remove code. [!MACH_KERNEL] (kbdioctl, kbdselect, kbdread): Remove functions. [!MACH_KERNEL] (X_kdb_enter_init, X_kdb_exit_init: Likewise. * i386/i386at/kd_mouse.c [!MACH_KERNEL]: Remove includes. [!MACH_KERNEL] (mouse_sel, mousepgrp, mouseflag): Remove variables. [!MACH_KERNEL] (MOUSE_COLL, MOUSE_ASYNC, MOUSE_NBIO): Remove macros. (mouseopen, mouseclose, kd_mouse_read, mouse_enqueue) [!MACH_KERNEL]: Remove code. [!MACH_KERNEL] (mouseioctl, mouseselect, mouseread): Remove functions. * i386/i386at/lpr.c [!MACH_KERNEL]: Remove includes. (lpropen) [MACH_KERNEL]: Remove preprocessor conditionals. (lpropen, lprclose, lprstart) [!MACH_KERNEL]: Remove code. [!MACH_KERNEL] (lprwrite, lprioctl, lprstop): Remove functions. * i386/i386at/rtc.c (readtodc, writetodc) [!MACH_KERNEL]: Remove code. * kern/mach_factor.c [MACH_KERNEL]: Remove preprocessor conditional. * xen/time.c (readtodc) [!MACH_KERNEL]: Remove code.
2011-09-06* .gitignore: Tighten some rules, and distribute others to...Thomas Schwinge
* doc/.gitignore: ... here; * i386/i386/.gitignore: ... here; * tests/.gitignore: ..., and here.
2011-09-06* i386/i386/pcb.h (stack_attach): Parameterize the continuation parameter'sThomas Schwinge
parameter list. * i386/i386/pcb.c (stack_attach): Likewise.
2011-09-06Move i386/i386/locore.S declarations.Thomas Schwinge
* i386/i386/trap.c (recover_table, recover_table_end, retry_table) (retry_table_end): Move declarations to... * i386/i386/locore.h: ... here.
2011-09-02Use Mach native error codes instead of POSIX errno E* onesGuillem Jover
* device/errno.h: Remove file. * Makefrag.am (libkernel_a_SOURCES): Remove `device/errno.h'. * i386/i386at/com.c: Include <device/device_types.h> instead of <device/errno.h>. (comopen): Replace ENXIO with D_NO_SUCH_DEVICE. * i386/i386at/kd_event.c: Include <device/device_types.h> instead of <device/errno.h>. * i386/i386at/kd_mouse.c: Likewise. (mouseopen): Replace ENODEV with D_NO_SUCH_DEVICE and EBUSY with D_ALREADY_OPEN. * i386/i386at/lpr.c: Include <device/device_types.h> instead of <device/errno.h>. (lpropen): Replace ENXIO with D_NO_SUCH_DEVICE and EBUSY with D_ALREADY_OPEN.
2011-09-01Fix documentationSamuel Thibault
2011-09-01Close kernel stacks.Samuel Thibault
* i386/i386/pcb.c (stack_attach): Initialize ebp to 0.
2011-09-01Fix PC samplingSamuel Thibault
interrupt.S now saves the IRQ on the stack to acknowledge it later. * i386/i386/hardclock.c (hardclock): Add irq parameter. * i386/i386at/kd.c (kdintr, kdcheckmagic): Remove regs parameter. * i386/i386at/kd.h (kdintr): Likewise.
2011-08-31Optimize copyout pathSamuel Thibault
* i386/i386/locore.S (copyout): Remove RETRY() use from >=i486 variant. Move copyout_ret and copyout_fail.
2011-08-31Fix copyout retry on lazy allocation on >= i486Samuel Thibault
* i386/i386/locore.S (copyout): Add a >=i486 variant of copyout which uses no loop, but simply retries rep mov.
2011-08-31Disable global page while writing in kernel spaceSamuel Thibault
* i386/i386/db_interface.c (db_write_bytes): If CPU has PGE feature, disable CR4_PGE before enabling kernel page write access, and re-enable the former after disabling the latter.
2011-08-31Protect set_cr3 against compiler assignment optimizationsSamuel Thibault
This fixes the kdb `break' command. i386/i386/proc_reg.h (set_cr3): Add "memory" clobber.
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