diff options
Diffstat (limited to 'sys/powerpc/booke/booke_machdep.c')
| -rw-r--r-- | sys/powerpc/booke/booke_machdep.c | 388 |
1 files changed, 388 insertions, 0 deletions
diff --git a/sys/powerpc/booke/booke_machdep.c b/sys/powerpc/booke/booke_machdep.c new file mode 100644 index 0000000..2a27775 --- /dev/null +++ b/sys/powerpc/booke/booke_machdep.c @@ -0,0 +1,388 @@ +/*- + * Copyright (C) 2006-2012 Semihalf + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +/*- + * Copyright (C) 2001 Benno Rice + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $ + */ +/*- + * Copyright (C) 1995, 1996 Wolfgang Solfrank. + * Copyright (C) 1995, 1996 TooLs GmbH. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by TooLs GmbH. + * 4. The name of TooLs GmbH may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_compat.h" +#include "opt_ddb.h" +#include "opt_hwpmc_hooks.h" +#include "opt_kstack_pages.h" +#include "opt_platform.h" + +#include <sys/cdefs.h> +#include <sys/types.h> +#include <sys/param.h> +#include <sys/proc.h> +#include <sys/systm.h> +#include <sys/time.h> +#include <sys/bio.h> +#include <sys/buf.h> +#include <sys/bus.h> +#include <sys/cons.h> +#include <sys/cpu.h> +#include <sys/kdb.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/rwlock.h> +#include <sys/sysctl.h> +#include <sys/exec.h> +#include <sys/ktr.h> +#include <sys/syscallsubr.h> +#include <sys/sysproto.h> +#include <sys/signalvar.h> +#include <sys/sysent.h> +#include <sys/imgact.h> +#include <sys/msgbuf.h> +#include <sys/ptrace.h> + +#include <vm/vm.h> +#include <vm/pmap.h> +#include <vm/vm_page.h> +#include <vm/vm_object.h> +#include <vm/vm_pager.h> + +#include <machine/cpu.h> +#include <machine/kdb.h> +#include <machine/reg.h> +#include <machine/vmparam.h> +#include <machine/spr.h> +#include <machine/hid.h> +#include <machine/psl.h> +#include <machine/trap.h> +#include <machine/md_var.h> +#include <machine/mmuvar.h> +#include <machine/sigframe.h> +#include <machine/machdep.h> +#include <machine/metadata.h> +#include <machine/platform.h> + +#include <sys/linker.h> +#include <sys/reboot.h> + +#include <contrib/libfdt/libfdt.h> +#include <dev/fdt/fdt_common.h> +#include <dev/ofw/openfirm.h> + +#ifdef MPC85XX +#include <powerpc/mpc85xx/mpc85xx.h> +#endif + +#ifdef DDB +#include <ddb/ddb.h> +#endif + +#ifdef DEBUG +#define debugf(fmt, args...) printf(fmt, ##args) +#else +#define debugf(fmt, args...) +#endif + +extern unsigned char kernel_text[]; +extern unsigned char _etext[]; +extern unsigned char _edata[]; +extern unsigned char __bss_start[]; +extern unsigned char __sbss_start[]; +extern unsigned char __sbss_end[]; +extern unsigned char _end[]; +extern vm_offset_t __endkernel; + +/* + * Bootinfo is passed to us by legacy loaders. Save the address of the + * structure to handle backward compatibility. + */ +uint32_t *bootinfo; + +void print_kernel_section_addr(void); +void print_kenv(void); +u_int booke_init(uint32_t, uint32_t); +void ivor_setup(void); + +extern void *interrupt_vector_base; +extern void *int_critical_input; +extern void *int_machine_check; +extern void *int_data_storage; +extern void *int_instr_storage; +extern void *int_external_input; +extern void *int_alignment; +extern void *int_program; +extern void *int_syscall; +extern void *int_decrementer; +extern void *int_fixed_interval_timer; +extern void *int_watchdog; +extern void *int_data_tlb_error; +extern void *int_inst_tlb_error; +extern void *int_debug; +#ifdef HWPMC_HOOKS +extern void *int_performance_counter; +#endif + +#define SET_TRAP(ivor, handler) \ + KASSERT(((uintptr_t)(&handler) & ~0xffffUL) == \ + ((uintptr_t)(&interrupt_vector_base) & ~0xffffUL), \ + ("Handler " #handler " too far from interrupt vector base")); \ + mtspr(ivor, (uintptr_t)(&handler) & 0xffffUL); + +uintptr_t powerpc_init(vm_offset_t fdt, vm_offset_t, vm_offset_t, void *mdp); +void booke_cpu_init(void); + +void +booke_cpu_init(void) +{ + + pmap_mmu_install(MMU_TYPE_BOOKE, BUS_PROBE_GENERIC); +} + +void +ivor_setup(void) +{ + + mtspr(SPR_IVPR, ((uintptr_t)&interrupt_vector_base) & 0xffff0000); + + SET_TRAP(SPR_IVOR0, int_critical_input); + SET_TRAP(SPR_IVOR1, int_machine_check); + SET_TRAP(SPR_IVOR2, int_data_storage); + SET_TRAP(SPR_IVOR3, int_instr_storage); + SET_TRAP(SPR_IVOR4, int_external_input); + SET_TRAP(SPR_IVOR5, int_alignment); + SET_TRAP(SPR_IVOR6, int_program); + SET_TRAP(SPR_IVOR8, int_syscall); + SET_TRAP(SPR_IVOR10, int_decrementer); + SET_TRAP(SPR_IVOR11, int_fixed_interval_timer); + SET_TRAP(SPR_IVOR12, int_watchdog); + SET_TRAP(SPR_IVOR13, int_data_tlb_error); + SET_TRAP(SPR_IVOR14, int_inst_tlb_error); + SET_TRAP(SPR_IVOR15, int_debug); +#ifdef HWPMC_HOOKS + SET_TRAP(SPR_IVOR35, int_performance_counter); +#endif +} + +static int +booke_check_for_fdt(uint32_t arg1, vm_offset_t *dtbp) +{ + void *ptr; + + if (arg1 % 8 != 0) + return (-1); + + ptr = (void *)pmap_early_io_map(arg1, PAGE_SIZE); + if (fdt_check_header(ptr) != 0) + return (-1); + + *dtbp = (vm_offset_t)ptr; + + return (0); +} + +uintptr_t +booke_init(uint32_t arg1, uint32_t arg2) +{ + uintptr_t ret; + void *mdp; + vm_offset_t dtbp, end; + + end = (uintptr_t)_end; + dtbp = (vm_offset_t)NULL; + + /* Set up TLB initially */ + bootinfo = NULL; + bzero(__sbss_start, __sbss_end - __sbss_start); + bzero(__bss_start, _end - __bss_start); + tlb1_init(); + + /* + * Handle the various ways we can get loaded and started: + * - FreeBSD's loader passes the pointer to the metadata + * in arg1, with arg2 undefined. arg1 has a value that's + * relative to the kernel's link address (i.e. larger + * than 0xc0000000). + * - Juniper's loader passes the metadata pointer in arg2 + * and sets arg1 to zero. This is to signal that the + * loader maps the kernel and starts it at its link + * address (unlike the FreeBSD loader). + * - U-Boot passes the standard argc and argv parameters + * in arg1 and arg2 (resp). arg1 is between 1 and some + * relatively small number, such as 64K. arg2 is the + * physical address of the argv vector. + * - ePAPR loaders pass an FDT blob in r3 (arg1) and the magic hex + * string 0x45504150 ('ePAP') in r6 (which has been lost by now). + * r4 (arg2) is supposed to be set to zero, but is not always. + */ + + if (arg1 == 0) /* Juniper loader */ + mdp = (void *)arg2; + else if (booke_check_for_fdt(arg1, &dtbp) == 0) { /* ePAPR */ + end = roundup(end, 8); + memmove((void *)end, (void *)dtbp, fdt_totalsize((void *)dtbp)); + dtbp = end; + end += fdt_totalsize((void *)dtbp); + __endkernel = end; + mdp = NULL; + } else if (arg1 > (uintptr_t)kernel_text) /* FreeBSD loader */ + mdp = (void *)arg1; + else /* U-Boot */ + mdp = NULL; + + /* Reset TLB1 to get rid of temporary mappings */ + tlb1_init(); + + ret = powerpc_init(dtbp, 0, 0, mdp); + + /* Enable L1 caches */ + booke_enable_l1_cache(); + + return (ret); +} + +#define RES_GRANULE 32 +extern uint32_t tlb0_miss_locks[]; + +/* Initialise a struct pcpu. */ +void +cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) +{ + + pcpu->pc_tid_next = TID_MIN; + +#ifdef SMP + uint32_t *ptr; + int words_per_gran = RES_GRANULE / sizeof(uint32_t); + + ptr = &tlb0_miss_locks[cpuid * words_per_gran]; + pcpu->pc_booke_tlb_lock = ptr; + *ptr = TLB_UNLOCKED; + *(ptr + 1) = 0; /* recurse counter */ +#endif +} + +/* Shutdown the CPU as much as possible. */ +void +cpu_halt(void) +{ + + mtmsr(mfmsr() & ~(PSL_CE | PSL_EE | PSL_ME | PSL_DE)); + while (1) + ; +} + +int +ptrace_single_step(struct thread *td) +{ + struct trapframe *tf; + + tf = td->td_frame; + tf->srr1 |= PSL_DE; + tf->cpu.booke.dbcr0 |= (DBCR0_IDM | DBCR0_IC); + return (0); +} + +int +ptrace_clear_single_step(struct thread *td) +{ + struct trapframe *tf; + + tf = td->td_frame; + tf->srr1 &= ~PSL_DE; + tf->cpu.booke.dbcr0 &= ~(DBCR0_IDM | DBCR0_IC); + return (0); +} + +void +kdb_cpu_clear_singlestep(void) +{ + register_t r; + + r = mfspr(SPR_DBCR0); + mtspr(SPR_DBCR0, r & ~DBCR0_IC); + kdb_frame->srr1 &= ~PSL_DE; +} + +void +kdb_cpu_set_singlestep(void) +{ + register_t r; + + r = mfspr(SPR_DBCR0); + mtspr(SPR_DBCR0, r | DBCR0_IC | DBCR0_IDM); + kdb_frame->srr1 |= PSL_DE; +} + |
