516 lines
11 KiB
C
516 lines
11 KiB
C
/*
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* Initial implementation:
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* Copyright (c) 2001 Robert Drehmel
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* All rights reserved.
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*
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* As long as the above copyright statement and this notice remain
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* unchanged, you can do what ever you want with this file.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* FreeBSD/sparc64 kernel loader - machine dependent part
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*
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* - implements copyin and readin functions that map kernel
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* pages on demand. The machine independent code does not
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* know the size of the kernel early enough to pre-enter
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* TTEs and install just one 4MB mapping seemed to limiting
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* to me.
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*/
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#include <stand.h>
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#include <sys/exec.h>
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/linker.h>
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#include <machine/asi.h>
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#include <machine/atomic.h>
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#include <machine/cpufunc.h>
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#include <machine/elf.h>
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#include <machine/lsu.h>
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#include <machine/metadata.h>
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#include <machine/tte.h>
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#include <machine/upa.h>
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#include "bootstrap.h"
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#include "libofw.h"
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#include "dev_net.h"
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enum {
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HEAPVA = 0x800000,
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HEAPSZ = 0x1000000,
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LOADSZ = 0x1000000 /* for kernel and modules */
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};
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struct memory_slice {
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vm_offset_t pstart;
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vm_offset_t size;
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};
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typedef void kernel_entry_t(vm_offset_t mdp, u_long o1, u_long o2, u_long o3,
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void *openfirmware);
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extern void itlb_enter(u_long vpn, u_long data);
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extern void dtlb_enter(u_long vpn, u_long data);
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extern vm_offset_t itlb_va_to_pa(vm_offset_t);
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extern vm_offset_t dtlb_va_to_pa(vm_offset_t);
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extern vm_offset_t md_load(char *, vm_offset_t *);
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static int __elfN(exec)(struct preloaded_file *);
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static int sparc64_autoload(void);
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static int mmu_mapin(vm_offset_t, vm_size_t);
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extern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[];
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struct tlb_entry *dtlb_store;
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struct tlb_entry *itlb_store;
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int dtlb_slot;
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int itlb_slot;
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int dtlb_slot_max;
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int itlb_slot_max;
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vm_offset_t curkva = 0;
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vm_offset_t heapva;
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phandle_t pmemh; /* OFW memory handle */
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struct memory_slice memslices[18];
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/*
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* Machine dependent structures that the machine independent
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* loader part uses.
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*/
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struct devsw *devsw[] = {
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#ifdef LOADER_DISK_SUPPORT
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&ofwdisk,
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#endif
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#ifdef LOADER_NET_SUPPORT
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&netdev,
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#endif
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0
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};
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struct arch_switch archsw;
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struct file_format sparc64_elf = {
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__elfN(loadfile),
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__elfN(exec)
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};
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struct file_format *file_formats[] = {
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&sparc64_elf,
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0
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};
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struct fs_ops *file_system[] = {
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#ifdef LOADER_UFS_SUPPORT
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&ufs_fsops,
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#endif
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#ifdef LOADER_CD9660_SUPPORT
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&cd9660_fsops,
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#endif
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#ifdef LOADER_ZIP_SUPPORT
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&zipfs_fsops,
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#endif
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#ifdef LOADER_GZIP_SUPPORT
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&gzipfs_fsops,
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#endif
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#ifdef LOADER_BZIP2_SUPPORT
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&bzipfs_fsops,
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#endif
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#ifdef LOADER_NFS_SUPPORT
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&nfs_fsops,
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#endif
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#ifdef LOADER_TFTP_SUPPORT
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&tftp_fsops,
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#endif
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0
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};
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struct netif_driver *netif_drivers[] = {
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#ifdef LOADER_NET_SUPPORT
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&ofwnet,
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#endif
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0
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};
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extern struct console ofwconsole;
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struct console *consoles[] = {
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&ofwconsole,
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0
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};
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#ifdef LOADER_DEBUG
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static int
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watch_phys_set_mask(vm_offset_t pa, u_long mask)
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{
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u_long lsucr;
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stxa(AA_DMMU_PWPR, ASI_DMMU, pa & (((2UL << 38) - 1) << 3));
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lsucr = ldxa(0, ASI_LSU_CTL_REG);
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lsucr = ((lsucr | LSU_PW) & ~LSU_PM_MASK) |
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(mask << LSU_PM_SHIFT);
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stxa(0, ASI_LSU_CTL_REG, lsucr);
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return (0);
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}
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static int
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watch_phys_set(vm_offset_t pa, int sz)
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{
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u_long off;
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off = (u_long)pa & 7;
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/* Test for misaligned watch points. */
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if (off + sz > 8)
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return (-1);
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return (watch_phys_set_mask(pa, ((1 << sz) - 1) << off));
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}
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static int
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watch_virt_set_mask(vm_offset_t va, u_long mask)
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{
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u_long lsucr;
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stxa(AA_DMMU_VWPR, ASI_DMMU, va & (((2UL << 41) - 1) << 3));
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lsucr = ldxa(0, ASI_LSU_CTL_REG);
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lsucr = ((lsucr | LSU_VW) & ~LSU_VM_MASK) |
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(mask << LSU_VM_SHIFT);
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stxa(0, ASI_LSU_CTL_REG, lsucr);
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return (0);
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}
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static int
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watch_virt_set(vm_offset_t va, int sz)
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{
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u_long off;
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off = (u_long)va & 7;
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/* Test for misaligned watch points. */
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if (off + sz > 8)
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return (-1);
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return (watch_virt_set_mask(va, ((1 << sz) - 1) << off));
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}
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#endif
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/*
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* archsw functions
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*/
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static int
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sparc64_autoload(void)
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{
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printf("nothing to autoload yet.\n");
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return 0;
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}
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static ssize_t
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sparc64_readin(const int fd, vm_offset_t va, const size_t len)
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{
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mmu_mapin(va, len);
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return read(fd, (void *)va, len);
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}
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static ssize_t
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sparc64_copyin(const void *src, vm_offset_t dest, size_t len)
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{
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mmu_mapin(dest, len);
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memcpy((void *)dest, src, len);
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return len;
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}
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/*
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* other MD functions
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*/
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static int
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__elfN(exec)(struct preloaded_file *fp)
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{
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struct file_metadata *fmp;
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vm_offset_t mdp;
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Elf_Addr entry;
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Elf_Ehdr *e;
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int error;
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if ((fmp = file_findmetadata(fp, MODINFOMD_ELFHDR)) == 0) {
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return EFTYPE;
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}
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e = (Elf_Ehdr *)&fmp->md_data;
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if ((error = md_load(fp->f_args, &mdp)) != 0)
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return error;
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printf("jumping to kernel entry at %#lx.\n", e->e_entry);
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#if 0
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pmap_print_tlb('i');
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pmap_print_tlb('d');
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#endif
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entry = e->e_entry;
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OF_release(heapva, HEAPSZ);
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((kernel_entry_t *)entry)(mdp, 0, 0, 0, openfirmware);
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panic("exec returned");
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}
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static int
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mmu_mapin(vm_offset_t va, vm_size_t len)
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{
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vm_offset_t pa, mva;
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u_long data;
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if (va + len > curkva)
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curkva = va + len;
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pa = (vm_offset_t)-1;
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len += va & PAGE_MASK_4M;
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va &= ~PAGE_MASK_4M;
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while (len) {
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if (dtlb_va_to_pa(va) == (vm_offset_t)-1 ||
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itlb_va_to_pa(va) == (vm_offset_t)-1) {
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/* Allocate a physical page, claim the virtual area */
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if (pa == (vm_offset_t)-1) {
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pa = (vm_offset_t)OF_alloc_phys(PAGE_SIZE_4M,
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PAGE_SIZE_4M);
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if (pa == (vm_offset_t)-1)
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panic("out of memory");
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mva = (vm_offset_t)OF_claim_virt(va,
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PAGE_SIZE_4M, 0);
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if (mva != va) {
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panic("can't claim virtual page "
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"(wanted %#lx, got %#lx)",
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va, mva);
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}
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/* The mappings may have changed, be paranoid. */
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continue;
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}
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/*
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* Actually, we can only allocate two pages less at
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* most (depending on the kernel TSB size).
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*/
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if (dtlb_slot >= dtlb_slot_max)
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panic("mmu_mapin: out of dtlb_slots");
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if (itlb_slot >= itlb_slot_max)
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panic("mmu_mapin: out of itlb_slots");
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data = TD_V | TD_4M | TD_PA(pa) | TD_L | TD_CP |
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TD_CV | TD_P | TD_W;
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dtlb_store[dtlb_slot].te_pa = pa;
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dtlb_store[dtlb_slot].te_va = va;
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itlb_store[itlb_slot].te_pa = pa;
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itlb_store[itlb_slot].te_va = va;
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dtlb_slot++;
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itlb_slot++;
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dtlb_enter(va, data);
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itlb_enter(va, data);
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pa = (vm_offset_t)-1;
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}
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len -= len > PAGE_SIZE_4M ? PAGE_SIZE_4M : len;
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va += PAGE_SIZE_4M;
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}
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if (pa != (vm_offset_t)-1)
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OF_release_phys(pa, PAGE_SIZE_4M);
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return 0;
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}
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static vm_offset_t
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init_heap(void)
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{
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if ((pmemh = OF_finddevice("/memory")) == (phandle_t)-1)
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OF_exit();
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if (OF_getprop(pmemh, "available", memslices, sizeof(memslices)) <= 0)
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OF_exit();
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/* There is no need for continuous physical heap memory. */
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heapva = (vm_offset_t)OF_claim((void *)HEAPVA, HEAPSZ, 32);
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return heapva;
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}
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static void
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tlb_init(void)
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{
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phandle_t child;
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phandle_t root;
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char buf[128];
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u_int bootcpu;
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u_int cpu;
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bootcpu = UPA_CR_GET_MID(ldxa(0, ASI_UPA_CONFIG_REG));
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if ((root = OF_peer(0)) == -1)
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panic("main: OF_peer");
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for (child = OF_child(root); child != 0; child = OF_peer(child)) {
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if (child == -1)
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panic("main: OF_child");
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if (OF_getprop(child, "device_type", buf, sizeof(buf)) > 0 &&
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strcmp(buf, "cpu") == 0) {
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if (OF_getprop(child, "upa-portid", &cpu,
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sizeof(cpu)) == -1 && OF_getprop(child, "portid",
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&cpu, sizeof(cpu)) == -1)
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panic("main: OF_getprop");
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if (cpu == bootcpu)
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break;
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}
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}
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if (cpu != bootcpu)
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panic("init_tlb: no node for bootcpu?!?!");
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if (OF_getprop(child, "#dtlb-entries", &dtlb_slot_max,
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sizeof(dtlb_slot_max)) == -1 ||
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OF_getprop(child, "#itlb-entries", &itlb_slot_max,
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sizeof(itlb_slot_max)) == -1)
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panic("init_tlb: OF_getprop");
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dtlb_store = malloc(dtlb_slot_max * sizeof(*dtlb_store));
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itlb_store = malloc(itlb_slot_max * sizeof(*itlb_store));
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if (dtlb_store == NULL || itlb_store == NULL)
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panic("init_tlb: malloc");
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}
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int
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main(int (*openfirm)(void *))
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{
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char bootpath[64];
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struct devsw **dp;
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phandle_t chosenh;
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/*
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* Tell the OpenFirmware functions where they find the ofw gate.
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*/
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OF_init(openfirm);
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archsw.arch_getdev = ofw_getdev;
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archsw.arch_copyin = sparc64_copyin;
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archsw.arch_copyout = ofw_copyout;
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archsw.arch_readin = sparc64_readin;
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archsw.arch_autoload = sparc64_autoload;
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init_heap();
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setheap((void *)heapva, (void *)(heapva + HEAPSZ));
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/*
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* Probe for a console.
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*/
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cons_probe();
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tlb_init();
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bcache_init(32, 512);
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/*
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* Initialize devices.
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*/
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for (dp = devsw; *dp != 0; dp++) {
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if ((*dp)->dv_init != 0)
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(*dp)->dv_init();
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}
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/*
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* Set up the current device.
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*/
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chosenh = OF_finddevice("/chosen");
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OF_getprop(chosenh, "bootpath", bootpath, sizeof(bootpath));
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/*
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* Sun compatible bootable CD-ROMs have a disk label placed
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* before the cd9660 data, with the actual filesystem being
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* in the first partition, while the other partitions contain
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* pseudo disk labels with embedded boot blocks for different
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* architectures, which may be followed by UFS filesystems.
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* The firmware will set the boot path to the partition it
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* boots from ('f' in the sun4u case), but we want the kernel
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* to be loaded from the cd9660 fs ('a'), so the boot path
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* needs to be altered.
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*/
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if (bootpath[strlen(bootpath) - 2] == ':' &&
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bootpath[strlen(bootpath) - 1] == 'f') {
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bootpath[strlen(bootpath) - 1] = 'a';
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printf("Boot path set to %s\n", bootpath);
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}
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env_setenv("currdev", EV_VOLATILE, bootpath,
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ofw_setcurrdev, env_nounset);
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env_setenv("loaddev", EV_VOLATILE, bootpath,
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env_noset, env_nounset);
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printf("\n");
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printf("%s, Revision %s\n", bootprog_name, bootprog_rev);
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printf("(%s, %s)\n", bootprog_maker, bootprog_date);
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printf("bootpath=\"%s\"\n", bootpath);
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/* Give control to the machine independent loader code. */
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interact();
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return 1;
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}
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COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot);
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static int
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command_reboot(int argc, char *argv[])
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{
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int i;
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for (i = 0; devsw[i] != NULL; ++i)
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if (devsw[i]->dv_cleanup != NULL)
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(devsw[i]->dv_cleanup)();
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printf("Rebooting...\n");
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OF_exit();
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}
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/* provide this for panic, as it's not in the startup code */
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void
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exit(int code)
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{
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OF_exit();
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}
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#ifdef LOADER_DEBUG
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typedef u_int64_t tte_t;
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const char *page_sizes[] = {
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" 8k", " 64k", "512k", " 4m"
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};
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static void
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pmap_print_tte(tte_t tag, tte_t tte)
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{
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printf("%s %s ",
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page_sizes[(tte & TD_SIZE_MASK) >> TD_SIZE_SHIFT],
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tag & TD_G ? "G" : " ");
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printf(tte & TD_W ? "W " : " ");
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printf(tte & TD_P ? "\e[33mP\e[0m " : " ");
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printf(tte & TD_E ? "E " : " ");
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printf(tte & TD_CV ? "CV " : " ");
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printf(tte & TD_CP ? "CP " : " ");
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printf(tte & TD_L ? "\e[32mL\e[0m " : " ");
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printf(tte & TD_IE ? "IE " : " ");
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printf(tte & TD_NFO ? "NFO " : " ");
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printf("tag=0x%lx pa=0x%lx va=0x%lx ctx=%ld\n", tag, TD_PA(tte),
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TT_VA(tag), TT_CTX(tag));
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}
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void
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pmap_print_tlb(char which)
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{
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int i;
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tte_t tte, tag;
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for (i = 0; i < 64*8; i += 8) {
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if (which == 'i') {
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__asm__ __volatile__("ldxa [%1] %2, %0\n" :
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"=r" (tag) : "r" (i),
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"i" (ASI_ITLB_TAG_READ_REG));
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__asm__ __volatile__("ldxa [%1] %2, %0\n" :
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"=r" (tte) : "r" (i),
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"i" (ASI_ITLB_DATA_ACCESS_REG));
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}
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else {
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__asm__ __volatile__("ldxa [%1] %2, %0\n" :
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"=r" (tag) : "r" (i),
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"i" (ASI_DTLB_TAG_READ_REG));
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__asm__ __volatile__("ldxa [%1] %2, %0\n" :
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"=r" (tte) : "r" (i),
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"i" (ASI_DTLB_DATA_ACCESS_REG));
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}
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if (!(tte & TD_V))
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continue;
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printf("%cTLB-%2u: ", which, i>>3);
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pmap_print_tte(tag, tte);
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}
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}
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#endif
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