/*- * 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 __FBSDID("$FreeBSD$"); #include "opt_compat.h" #include "opt_ddb.h" #include "opt_kstack_pages.h" #include "opt_platform.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DDB extern vm_offset_t ksym_start, ksym_end; #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[]; /* * Bootinfo is passed to us by legacy loaders. Save the address of the * structure to handle backward compatibility. */ uint32_t *bootinfo; struct kva_md_info kmi; struct pcpu __pcpu[MAXCPU]; struct trapframe frame0; int cold = 1; long realmem = 0; long Maxmem = 0; char machine[] = "powerpc"; SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); int cacheline_size = 32; SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, CTLFLAG_RD, &cacheline_size, 0, ""); int hw_direct_map = 0; static void cpu_booke_startup(void *); SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_booke_startup, NULL); void print_kernel_section_addr(void); void print_kenv(void); u_int booke_init(uint32_t, uint32_t); extern int elf32_nxstack; static void cpu_booke_startup(void *dummy) { int indx; unsigned long size; /* Initialise the decrementer-based clock. */ decr_init(); /* Good {morning,afternoon,evening,night}. */ cpu_setup(PCPU_GET(cpuid)); printf("real memory = %lu (%ld MB)\n", ptoa(physmem), ptoa(physmem) / 1048576); realmem = physmem; /* Display any holes after the first chunk of extended memory. */ if (bootverbose) { printf("Physical memory chunk(s):\n"); for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { size = phys_avail[indx + 1] - phys_avail[indx]; printf("0x%08x - 0x%08x, %lu bytes (%lu pages)\n", phys_avail[indx], phys_avail[indx + 1] - 1, size, size / PAGE_SIZE); } } vm_ksubmap_init(&kmi); printf("avail memory = %lu (%ld MB)\n", ptoa(cnt.v_free_count), ptoa(cnt.v_free_count) / 1048576); /* Set up buffers, so they can be used to read disk labels. */ bufinit(); vm_pager_bufferinit(); /* Cpu supports execution permissions on the pages. */ elf32_nxstack = 1; } static char * kenv_next(char *cp) { if (cp != NULL) { while (*cp != 0) cp++; cp++; if (*cp == 0) cp = NULL; } return (cp); } void print_kenv(void) { int len; char *cp; debugf("loader passed (static) kenv:\n"); if (kern_envp == NULL) { debugf(" no env, null ptr\n"); return; } debugf(" kern_envp = 0x%08x\n", (u_int32_t)kern_envp); len = 0; for (cp = kern_envp; cp != NULL; cp = kenv_next(cp)) debugf(" %x %s\n", (u_int32_t)cp, cp); } void print_kernel_section_addr(void) { debugf("kernel image addresses:\n"); debugf(" kernel_text = 0x%08x\n", (uint32_t)kernel_text); debugf(" _etext (sdata) = 0x%08x\n", (uint32_t)_etext); debugf(" _edata = 0x%08x\n", (uint32_t)_edata); debugf(" __sbss_start = 0x%08x\n", (uint32_t)__sbss_start); debugf(" __sbss_end = 0x%08x\n", (uint32_t)__sbss_end); debugf(" __sbss_start = 0x%08x\n", (uint32_t)__bss_start); debugf(" _end = 0x%08x\n", (uint32_t)_end); } 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); } u_int booke_init(uint32_t arg1, uint32_t arg2) { struct pcpu *pc; void *kmdp, *mdp; vm_offset_t dtbp, end; kmdp = NULL; end = (uintptr_t)_end; dtbp = (vm_offset_t)NULL; /* Set up TLB initially */ bootinfo = NULL; 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); mdp = NULL; } else if (arg1 > (uintptr_t)kernel_text) /* FreeBSD loader */ mdp = (void *)arg1; else /* U-Boot */ mdp = NULL; /* * Parse metadata and fetch parameters. */ if (mdp != NULL) { preload_metadata = mdp; kmdp = preload_search_by_type("elf kernel"); if (kmdp != NULL) { boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t); end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); bootinfo = (uint32_t *)preload_search_info(kmdp, MODINFO_METADATA | MODINFOMD_BOOTINFO); #ifdef DDB ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); #endif } } else { bzero(__sbss_start, __sbss_end - __sbss_start); bzero(__bss_start, _end - __bss_start); } #if defined(FDT_DTB_STATIC) /* * In case the device tree blob was not retrieved (from metadata) try * to use the statically embedded one. */ if (dtbp == (vm_offset_t)NULL) dtbp = (vm_offset_t)&fdt_static_dtb; #endif if (OF_install(OFW_FDT, 0) == FALSE) while (1); if (OF_init((void *)dtbp) != 0) while (1); OF_interpret("perform-fixup", 0); /* Reset TLB1 to get rid of temporary mappings */ tlb1_init(); /* Reset Time Base */ mttb(0); /* Init params/tunables that can be overridden by the loader. */ init_param1(); /* Start initializing proc0 and thread0. */ proc_linkup0(&proc0, &thread0); thread0.td_frame = &frame0; /* Set up per-cpu data and store the pointer in SPR general 0. */ pc = &__pcpu[0]; pcpu_init(pc, 0, sizeof(struct pcpu)); pc->pc_curthread = &thread0; #ifdef __powerpc64__ __asm __volatile("mr 13,%0" :: "r"(pc->pc_curthread)); #else __asm __volatile("mr 2,%0" :: "r"(pc->pc_curthread)); #endif __asm __volatile("mtsprg 0, %0" :: "r"(pc)); /* Initialize system mutexes. */ mutex_init(); /* Initialize the console before printing anything. */ cninit(); /* Print out some debug info... */ debugf("%s: console initialized\n", __func__); debugf(" arg3 mdp = 0x%08x\n", (u_int32_t)mdp); debugf(" end = 0x%08x\n", (u_int32_t)end); debugf(" boothowto = 0x%08x\n", boothowto); debugf(" kernel ccsrbar = 0x%08x\n", CCSRBAR_VA); debugf(" MSR = 0x%08x\n", mfmsr()); #if defined(BOOKE_E500) debugf(" HID0 = 0x%08x\n", mfspr(SPR_HID0)); debugf(" HID1 = 0x%08x\n", mfspr(SPR_HID1)); debugf(" BUCSR = 0x%08x\n", mfspr(SPR_BUCSR)); #endif debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp); print_kernel_section_addr(); print_kenv(); #if defined(BOOKE_E500) //tlb1_print_entries(); //tlb1_print_tlbentries(); #endif kdb_init(); #ifdef KDB if (boothowto & RB_KDB) kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger"); #endif /* Initialise platform module */ platform_probe_and_attach(); /* Initialise virtual memory. */ pmap_mmu_install(MMU_TYPE_BOOKE, 0); pmap_bootstrap((uintptr_t)kernel_text, end); pmap_bootstrapped = 1; debugf("MSR = 0x%08x\n", mfmsr()); #if defined(BOOKE_E500) //tlb1_print_entries(); //tlb1_print_tlbentries(); #endif /* Initialize params/tunables that are derived from memsize. */ init_param2(physmem); /* Finish setting up thread0. */ thread0.td_pcb = (struct pcb *) ((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE - sizeof(struct pcb)) & ~15); bzero((void *)thread0.td_pcb, sizeof(struct pcb)); pc->pc_curpcb = thread0.td_pcb; /* Initialise the message buffer. */ msgbufinit(msgbufp, msgbufsize); /* Enable Machine Check interrupt. */ mtmsr(mfmsr() | PSL_ME); isync(); /* Enable L1 caches */ booke_enable_l1_cache(); debugf("%s: SP = 0x%08x\n", __func__, ((uintptr_t)thread0.td_pcb - 16) & ~15); return (((uintptr_t)thread0.td_pcb - 16) & ~15); } #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 } /* * Flush the D-cache for non-DMA I/O so that the I-cache can * be made coherent later. */ void cpu_flush_dcache(void *ptr, size_t len) { register_t addr, off; /* * Align the address to a cacheline and adjust the length * accordingly. Then round the length to a multiple of the * cacheline for easy looping. */ addr = (uintptr_t)ptr; off = addr & (cacheline_size - 1); addr -= off; len = (len + off + cacheline_size - 1) & ~(cacheline_size - 1); while (len > 0) { __asm __volatile ("dcbf 0,%0" :: "r"(addr)); __asm __volatile ("sync"); addr += cacheline_size; len -= cacheline_size; } } void spinlock_enter(void) { struct thread *td; register_t msr; td = curthread; if (td->td_md.md_spinlock_count == 0) { msr = intr_disable(); td->td_md.md_spinlock_count = 1; td->td_md.md_saved_msr = msr; } else td->td_md.md_spinlock_count++; critical_enter(); } void spinlock_exit(void) { struct thread *td; register_t msr; td = curthread; critical_exit(); msr = td->td_md.md_saved_msr; td->td_md.md_spinlock_count--; if (td->td_md.md_spinlock_count == 0) intr_restore(msr); } /* 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_set_pc(struct thread *td, unsigned long addr) { struct trapframe *tf; tf = td->td_frame; tf->srr0 = (register_t)addr; return (0); } 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; } void bzero(void *buf, size_t len) { caddr_t p; p = buf; while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { *p++ = 0; len--; } while (len >= sizeof(u_long) * 8) { *(u_long*) p = 0; *((u_long*) p + 1) = 0; *((u_long*) p + 2) = 0; *((u_long*) p + 3) = 0; len -= sizeof(u_long) * 8; *((u_long*) p + 4) = 0; *((u_long*) p + 5) = 0; *((u_long*) p + 6) = 0; *((u_long*) p + 7) = 0; p += sizeof(u_long) * 8; } while (len >= sizeof(u_long)) { *(u_long*) p = 0; len -= sizeof(u_long); p += sizeof(u_long); } while (len) { *p++ = 0; len--; } }