3c0b081966
The metadata pointer will almost never be at or above 'btext', as btext is a relocated symbol, so will be based at VM_MIN_KERNEL_ADDRESS, not at KERNBASE. Check the address against kernload, where the kernel is physically loaded.
456 lines
13 KiB
C
456 lines
13 KiB
C
/*-
|
|
* 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_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 DDB
|
|
#include <ddb/ddb.h>
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
#define debugf(fmt, args...) printf(fmt, ##args)
|
|
#else
|
|
#define debugf(fmt, args...)
|
|
#endif
|
|
|
|
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;
|
|
extern vm_paddr_t kernload;
|
|
|
|
/*
|
|
* 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);
|
|
uintptr_t booke_init(u_long, u_long);
|
|
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_fpu;
|
|
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;
|
|
extern void *int_debug_ed;
|
|
extern void *int_vec;
|
|
extern void *int_vecast;
|
|
#ifdef __SPE__
|
|
extern void *int_spe_fpdata;
|
|
extern void *int_spe_fpround;
|
|
#endif
|
|
#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,
|
|
uint32_t mdp_cookie);
|
|
void booke_cpu_init(void);
|
|
|
|
void
|
|
booke_cpu_init(void)
|
|
{
|
|
|
|
cpu_features |= PPC_FEATURE_BOOKE;
|
|
|
|
psl_kernset = PSL_CE | PSL_ME | PSL_EE;
|
|
#ifdef __powerpc64__
|
|
psl_kernset |= PSL_CM;
|
|
#endif
|
|
psl_userset = psl_kernset | PSL_PR;
|
|
#ifdef __powerpc64__
|
|
psl_userset32 = psl_userset & ~PSL_CM;
|
|
#endif
|
|
psl_userstatic = ~(PSL_VEC | PSL_FP | PSL_FE0 | PSL_FE1);
|
|
|
|
pmap_mmu_install(MMU_TYPE_BOOKE, BUS_PROBE_GENERIC);
|
|
}
|
|
|
|
void
|
|
ivor_setup(void)
|
|
{
|
|
|
|
mtspr(SPR_IVPR, ((uintptr_t)&interrupt_vector_base) & ~0xffffUL);
|
|
|
|
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
|
|
switch ((mfpvr() >> 16) & 0xffff) {
|
|
case FSL_E6500:
|
|
SET_TRAP(SPR_IVOR32, int_vec);
|
|
SET_TRAP(SPR_IVOR33, int_vecast);
|
|
/* FALLTHROUGH */
|
|
case FSL_E500mc:
|
|
case FSL_E5500:
|
|
SET_TRAP(SPR_IVOR7, int_fpu);
|
|
SET_TRAP(SPR_IVOR15, int_debug_ed);
|
|
break;
|
|
case FSL_E500v1:
|
|
case FSL_E500v2:
|
|
SET_TRAP(SPR_IVOR32, int_vec);
|
|
#ifdef __SPE__
|
|
SET_TRAP(SPR_IVOR33, int_spe_fpdata);
|
|
SET_TRAP(SPR_IVOR34, int_spe_fpround);
|
|
#endif
|
|
break;
|
|
}
|
|
|
|
#ifdef __powerpc64__
|
|
/* Set 64-bit interrupt mode. */
|
|
mtspr(SPR_EPCR, mfspr(SPR_EPCR) | EPCR_ICM);
|
|
#endif
|
|
}
|
|
|
|
static int
|
|
booke_check_for_fdt(uint32_t arg1, vm_offset_t *dtbp)
|
|
{
|
|
void *ptr;
|
|
int fdt_size;
|
|
|
|
if (arg1 % 8 != 0)
|
|
return (-1);
|
|
|
|
ptr = (void *)pmap_early_io_map(arg1, PAGE_SIZE);
|
|
if (fdt_check_header(ptr) != 0)
|
|
return (-1);
|
|
|
|
/*
|
|
* Read FDT total size from the header of FDT.
|
|
* This for sure hits within first page which is
|
|
* already mapped.
|
|
*/
|
|
fdt_size = fdt_totalsize((void *)ptr);
|
|
|
|
/*
|
|
* Ok, arg1 points to FDT, so we need to map it in.
|
|
* First, unmap this page and then map FDT again with full size
|
|
*/
|
|
pmap_early_io_unmap((vm_offset_t)ptr, PAGE_SIZE);
|
|
ptr = (void *)pmap_early_io_map(arg1, fdt_size);
|
|
*dtbp = (vm_offset_t)ptr;
|
|
|
|
return (0);
|
|
}
|
|
|
|
uintptr_t
|
|
booke_init(u_long arg1, u_long 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)kernload) /* FreeBSD loader */
|
|
mdp = (void *)arg1;
|
|
else /* U-Boot */
|
|
mdp = NULL;
|
|
|
|
/* Default to 32 byte cache line size. */
|
|
switch ((mfpvr()) >> 16) {
|
|
case FSL_E500mc:
|
|
case FSL_E5500:
|
|
case FSL_E6500:
|
|
cacheline_size = 64;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Last element is a magic cookie that indicates that the metadata
|
|
* pointer is meaningful.
|
|
*/
|
|
ret = powerpc_init(dtbp, 0, 0, mdp, (mdp == NULL) ? 0 : 0xfb5d104d);
|
|
|
|
/* Enable caches */
|
|
booke_enable_l1_cache();
|
|
booke_enable_l2_cache();
|
|
|
|
booke_enable_bpred();
|
|
|
|
return (ret);
|
|
}
|
|
|
|
#define RES_GRANULE cacheline_size
|
|
extern uintptr_t tlb0_miss_locks[];
|
|
|
|
/* Initialise a struct pcpu. */
|
|
void
|
|
cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
|
|
{
|
|
|
|
pcpu->pc_booke.tid_next = TID_MIN;
|
|
|
|
#ifdef SMP
|
|
uintptr_t *ptr;
|
|
int words_per_gran = RES_GRANULE / sizeof(uintptr_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;
|
|
}
|
|
|