File Manager

003 File Manager

Current Path: /usr/src/sys/kern

📁 ..
📄 Make.tags.inc(2.13 KB)
📄 Makefile(302 B)
📄 bus_if.m(26.31 KB)
📄 capabilities.conf(13.67 KB)
📄 clock_if.m(1.7 KB)
📄 cpufreq_if.m(2.27 KB)
📄 device_if.m(10.41 KB)
📄 firmw.S(2.15 KB)
📄 genassym.sh(1.11 KB)
📄 genoffset.c(1.68 KB)
📄 genoffset.sh(3.58 KB)
📄 imgact_aout.c(9.45 KB)
📄 imgact_binmisc.c(18.64 KB)
📄 imgact_elf.c(76.32 KB)
📄 imgact_elf32.c(1.47 KB)
📄 imgact_elf64.c(1.47 KB)
📄 imgact_shell.c(8.41 KB)
📄 init_main.c(24.31 KB)
📄 init_sysent.c(95.3 KB)
📄 kern_acct.c(19.03 KB)
📄 kern_alq.c(24.97 KB)
📄 kern_clock.c(21.12 KB)
📄 kern_clocksource.c(23.34 KB)
📄 kern_condvar.c(11.28 KB)
📄 kern_conf.c(36.14 KB)
📄 kern_cons.c(15.75 KB)
📄 kern_context.c(3.59 KB)
📄 kern_cpu.c(30.77 KB)
📄 kern_cpuset.c(59.78 KB)
📄 kern_ctf.c(8.73 KB)
📄 kern_descrip.c(112.87 KB)
📄 kern_dtrace.c(2.94 KB)
📄 kern_dump.c(8.51 KB)
📄 kern_environment.c(22.75 KB)
📄 kern_et.c(7.1 KB)
📄 kern_event.c(62.49 KB)
📄 kern_exec.c(46.67 KB)
📄 kern_exit.c(34.61 KB)
📄 kern_fail.c(29.32 KB)
📄 kern_ffclock.c(12.66 KB)
📄 kern_fork.c(28.29 KB)
📄 kern_hhook.c(13.58 KB)
📄 kern_idle.c(2.74 KB)
📄 kern_intr.c(40.44 KB)
📄 kern_jail.c(112.67 KB)
📄 kern_kcov.c(15.32 KB)
📄 kern_khelp.c(9.45 KB)
📄 kern_kthread.c(11.8 KB)
📄 kern_ktr.c(11.93 KB)
📄 kern_ktrace.c(31.41 KB)
📄 kern_linker.c(54.3 KB)
📄 kern_lock.c(46.99 KB)
📄 kern_lockf.c(64.46 KB)
📄 kern_lockstat.c(3.8 KB)
📄 kern_loginclass.c(6.69 KB)
📄 kern_malloc.c(37.09 KB)
📄 kern_mbuf.c(43.16 KB)
📄 kern_mib.c(24.26 KB)
📄 kern_module.c(11.05 KB)
📄 kern_mtxpool.c(5.82 KB)
📄 kern_mutex.c(33.62 KB)
📄 kern_ntptime.c(32.49 KB)
📄 kern_osd.c(12.37 KB)
📄 kern_physio.c(5.74 KB)
📄 kern_pmc.c(8.89 KB)
📄 kern_poll.c(15.86 KB)
📄 kern_priv.c(9.14 KB)
📄 kern_proc.c(80.01 KB)
📄 kern_procctl.c(19.48 KB)
📄 kern_prot.c(57.94 KB)
📄 kern_racct.c(34.01 KB)
📄 kern_rangelock.c(8.67 KB)
📄 kern_rctl.c(53.87 KB)
📄 kern_resource.c(36.66 KB)
📄 kern_rmlock.c(28.27 KB)
📄 kern_rwlock.c(40.72 KB)
📄 kern_sdt.c(2.05 KB)
📄 kern_sema.c(4.85 KB)
📄 kern_sendfile.c(33.97 KB)
📄 kern_sharedpage.c(10.37 KB)
📄 kern_shutdown.c(43.34 KB)
📄 kern_sig.c(101.89 KB)
📄 kern_switch.c(13.85 KB)
📄 kern_sx.c(40.27 KB)
📄 kern_synch.c(18.17 KB)
📄 kern_syscalls.c(6.74 KB)
📄 kern_sysctl.c(67.24 KB)
📄 kern_tc.c(55.73 KB)
📄 kern_thr.c(14.14 KB)
📄 kern_thread.c(41.75 KB)
📄 kern_time.c(40.89 KB)
📄 kern_timeout.c(43.08 KB)
📄 kern_tslog.c(3.44 KB)
📄 kern_ubsan.c(50.74 KB)
📄 kern_umtx.c(107.14 KB)
📄 kern_uuid.c(11.68 KB)
📄 kern_xxx.c(10.44 KB)
📄 ksched.c(6.56 KB)
📄 link_elf.c(47.99 KB)
📄 link_elf_obj.c(44.41 KB)
📄 linker_if.m(3.96 KB)
📄 makesyscalls.sh(23.57 KB)
📄 md4c.c(7.89 KB)
📄 md5c.c(9.56 KB)
📄 msi_if.m(2.48 KB)
📄 p1003_1b.c(8.84 KB)
📄 pic_if.m(3.9 KB)
📄 posix4_mib.c(5.59 KB)
📄 sched_4bsd.c(45.03 KB)
📄 sched_ule.c(82.65 KB)
📄 serdev_if.m(3.49 KB)
📄 stack_protector.c(613 B)
📄 subr_acl_nfs4.c(37.42 KB)
📄 subr_acl_posix1e.c(17.71 KB)
📄 subr_atomic64.c(3.97 KB)
📄 subr_autoconf.c(7.7 KB)
📄 subr_blist.c(31.88 KB)
📄 subr_boot.c(5.8 KB)
📄 subr_bufring.c(2.21 KB)
📄 subr_bus.c(145.4 KB)
📄 subr_bus_dma.c(19.67 KB)
📄 subr_busdma_bufalloc.c(5.24 KB)
📄 subr_capability.c(11.93 KB)
📄 subr_clock.c(10.61 KB)
📄 subr_compressor.c(13.11 KB)
📄 subr_counter.c(4.44 KB)
📄 subr_coverage.c(6.17 KB)
📄 subr_csan.c(25.39 KB)
📄 subr_devmap.c(9.8 KB)
📄 subr_devstat.c(16.21 KB)
📄 subr_disk.c(8.54 KB)
📄 subr_dummy_vdso_tc.c(1.7 KB)
📄 subr_early.c(2.26 KB)
📄 subr_epoch.c(25.02 KB)
📄 subr_eventhandler.c(9.17 KB)
📄 subr_fattime.c(9.98 KB)
📄 subr_filter.c(12.2 KB)
📄 subr_firmware.c(13.88 KB)
📄 subr_gtaskqueue.c(20.19 KB)
📄 subr_hash.c(4.8 KB)
📄 subr_hints.c(12.87 KB)
📄 subr_intr.c(40.61 KB)
📄 subr_kdb.c(16.13 KB)
📄 subr_kobj.c(7.1 KB)
📄 subr_lock.c(18.81 KB)
📄 subr_log.c(7.64 KB)
📄 subr_mchain.c(11.06 KB)
📄 subr_module.c(12.98 KB)
📄 subr_msgbuf.c(10.6 KB)
📄 subr_param.c(10.93 KB)
📄 subr_pcpu.c(10.18 KB)
📄 subr_pctrie.c(20.99 KB)
📄 subr_physmem.c(11.52 KB)
📄 subr_pidctrl.c(5.43 KB)
📄 subr_power.c(3.13 KB)
📄 subr_prf.c(27.42 KB)
📄 subr_prng.c(3.36 KB)
📄 subr_prof.c(15.43 KB)
📄 subr_rangeset.c(8.5 KB)
📄 subr_rman.c(27.61 KB)
📄 subr_rtc.c(11.42 KB)
📄 subr_sbuf.c(20.53 KB)
📄 subr_scanf.c(15.59 KB)
📄 subr_sfbuf.c(6.17 KB)
📄 subr_sglist.c(22.83 KB)
📄 subr_sleepqueue.c(39.43 KB)
📄 subr_smp.c(31.62 KB)
📄 subr_smr.c(20.17 KB)
📄 subr_stack.c(6.47 KB)
📄 subr_stats.c(103.01 KB)
📄 subr_syscall.c(7.98 KB)
📄 subr_taskqueue.c(21.1 KB)
📄 subr_terminal.c(15.52 KB)
📄 subr_trap.c(10.87 KB)
📄 subr_turnstile.c(35.58 KB)
📄 subr_uio.c(11.38 KB)
📄 subr_unit.c(22.97 KB)
📄 subr_vmem.c(43.25 KB)
📄 subr_witness.c(84.59 KB)
📄 sys_capability.c(15.06 KB)
📄 sys_eventfd.c(8.42 KB)
📄 sys_generic.c(44.22 KB)
📄 sys_getrandom.c(4.21 KB)
📄 sys_pipe.c(45.14 KB)
📄 sys_procdesc.c(14.57 KB)
📄 sys_process.c(30.73 KB)
📄 sys_socket.c(20.11 KB)
📄 syscalls.c(22.73 KB)
📄 syscalls.master(60.26 KB)
📄 systrace_args.c(178.49 KB)
📄 sysv_ipc.c(6.53 KB)
📄 sysv_msg.c(48.65 KB)
📄 sysv_sem.c(49.85 KB)
📄 sysv_shm.c(43.93 KB)
📄 tty.c(55.14 KB)
📄 tty_compat.c(11.46 KB)
📄 tty_info.c(9.93 KB)
📄 tty_inq.c(12.22 KB)
📄 tty_outq.c(8.74 KB)
📄 tty_pts.c(19.74 KB)
📄 tty_tty.c(2.83 KB)
📄 tty_ttydisc.c(28.6 KB)
📄 uipc_accf.c(8.07 KB)
📄 uipc_debug.c(12.42 KB)
📄 uipc_domain.c(13.13 KB)
📄 uipc_ktls.c(55.7 KB)
📄 uipc_mbuf.c(52.45 KB)
📄 uipc_mbuf2.c(12.64 KB)
📄 uipc_mbufhash.c(4.9 KB)
📄 uipc_mqueue.c(64.64 KB)
📄 uipc_sem.c(25.18 KB)
📄 uipc_shm.c(50.47 KB)
📄 uipc_sockbuf.c(42.9 KB)
📄 uipc_socket.c(110.61 KB)
📄 uipc_syscalls.c(35.94 KB)
📄 uipc_usrreq.c(75.11 KB)
📄 vfs_acl.c(14.5 KB)
📄 vfs_aio.c(76.32 KB)
📄 vfs_bio.c(145.39 KB)
📄 vfs_cache.c(143.09 KB)
📄 vfs_cluster.c(28.36 KB)
📄 vfs_default.c(33.16 KB)
📄 vfs_export.c(14.55 KB)
📄 vfs_extattr.c(17.91 KB)
📄 vfs_hash.c(6 KB)
📄 vfs_init.c(15.86 KB)
📄 vfs_lookup.c(45.48 KB)
📄 vfs_mount.c(62.58 KB)
📄 vfs_mountroot.c(26.23 KB)
📄 vfs_subr.c(167.52 KB)
📄 vfs_syscalls.c(106.86 KB)
📄 vfs_vnops.c(86.28 KB)
📄 vnode_if.src(13.66 KB)

Editing: subr_devmap.c

/*-
 * Copyright (c) 2013 Ian Lepore <ian@freebsd.org>
 * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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("$FreeBSD$");

/* Routines for mapping device memory. */

#include "opt_ddb.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/devmap.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/pmap.h>
#include <machine/vmparam.h>

static const struct devmap_entry *devmap_table;
static boolean_t devmap_bootstrap_done = false;

/*
 * The allocated-kva (akva) devmap table and metadata.  Platforms can call
 * devmap_add_entry() to add static device mappings to this table using
 * automatically allocated virtual addresses carved out of the top of kva space.
 * Allocation begins immediately below the max kernel virtual address.
 */
#define	AKVA_DEVMAP_MAX_ENTRIES	32
static struct devmap_entry	akva_devmap_entries[AKVA_DEVMAP_MAX_ENTRIES];
static u_int			akva_devmap_idx;
static vm_offset_t		akva_devmap_vaddr = DEVMAP_MAX_VADDR;

#if defined(__aarch64__) || defined(__riscv)
extern int early_boot;
#endif

/*
 * Print the contents of the static mapping table using the provided printf-like
 * output function (which will be either printf or db_printf).
 */
static void
devmap_dump_table(int (*prfunc)(const char *, ...))
{
	const struct devmap_entry *pd;

if (devmap_table == NULL || devmap_table[0].pd_size == 0) {
		prfunc("No static device mappings.\n");
		return;
	}

prfunc("Static device mappings:\n");
	for (pd = devmap_table; pd->pd_size != 0; ++pd) {
		prfunc("  0x%08jx - 0x%08jx mapped at VA 0x%08jx\n",
		    (uintmax_t)pd->pd_pa,
		    (uintmax_t)(pd->pd_pa + pd->pd_size - 1),
		    (uintmax_t)pd->pd_va);
	}
}

/*
 * Print the contents of the static mapping table.  Used for bootverbose.
 */
void
devmap_print_table()
{
	devmap_dump_table(printf);
}

/*
 * Return the "last" kva address used by the registered devmap table.  It's
 * actually the lowest address used by the static mappings, i.e., the address of
 * the first unusable byte of KVA.
 */
vm_offset_t
devmap_lastaddr()
{
	const struct devmap_entry *pd;
	vm_offset_t lowaddr;

if (akva_devmap_idx > 0)
		return (akva_devmap_vaddr);

lowaddr = DEVMAP_MAX_VADDR;
	for (pd = devmap_table; pd != NULL && pd->pd_size != 0; ++pd) {
		if (lowaddr > pd->pd_va)
			lowaddr = pd->pd_va;
	}

return (lowaddr);
}

/*
 * Add an entry to the internal "akva" static devmap table using the given
 * physical address and size and a virtual address allocated from the top of
 * kva.  This automatically registers the akva table on the first call, so all a
 * platform has to do is call this routine to install as many mappings as it
 * needs and when the platform-specific init function calls devmap_bootstrap()
 * it will pick up all the entries in the akva table automatically.
 */
void
devmap_add_entry(vm_paddr_t pa, vm_size_t sz)
{
	struct devmap_entry *m;

if (devmap_bootstrap_done)
		panic("devmap_add_entry() after devmap_bootstrap()");

if (akva_devmap_idx == (AKVA_DEVMAP_MAX_ENTRIES - 1))
		panic("AKVA_DEVMAP_MAX_ENTRIES is too small");

if (akva_devmap_idx == 0)
		devmap_register_table(akva_devmap_entries);

/* Allocate virtual address space from the top of kva downwards. */
#ifdef __arm__
	/*
	 * If the range being mapped is aligned and sized to 1MB boundaries then
	 * also align the virtual address to the next-lower 1MB boundary so that
	 * we end with a nice efficient section mapping.
	 */
	if ((pa & 0x000fffff) == 0 && (sz & 0x000fffff) == 0) {
		akva_devmap_vaddr = trunc_1mpage(akva_devmap_vaddr - sz);
	} else
#endif
	{
		akva_devmap_vaddr = trunc_page(akva_devmap_vaddr - sz);
	}
	m = &akva_devmap_entries[akva_devmap_idx++];
	m->pd_va    = akva_devmap_vaddr;
	m->pd_pa    = pa;
	m->pd_size  = sz;
}

/*
 * Register the given table as the one to use in devmap_bootstrap().
 */
void
devmap_register_table(const struct devmap_entry *table)
{

devmap_table = table;
}

/*
 * Map all of the static regions in the devmap table, and remember the devmap
 * table so the mapdev, ptov, and vtop functions can do lookups later.
 *
 * If a non-NULL table pointer is given it is used unconditionally, otherwise
 * the previously-registered table is used.  This smooths transition from legacy
 * code that fills in a local table then calls this function passing that table,
 * and newer code that uses devmap_register_table() in platform-specific
 * code, then lets the common platform-specific init function call this function
 * with a NULL pointer.
 */
void
devmap_bootstrap(vm_offset_t l1pt, const struct devmap_entry *table)
{
	const struct devmap_entry *pd;

devmap_bootstrap_done = true;

/*
	 * If given a table pointer, use it.  Otherwise, if a table was
	 * previously registered, use it.  Otherwise, no work to do.
	 */
	if (table != NULL)
		devmap_table = table;
	else if (devmap_table == NULL)
		return;

for (pd = devmap_table; pd->pd_size != 0; ++pd) {
#if defined(__arm__)
#if __ARM_ARCH >= 6
		pmap_preboot_map_attr(pd->pd_pa, pd->pd_va, pd->pd_size,
		    VM_PROT_READ | VM_PROT_WRITE, VM_MEMATTR_DEVICE);
#else
		pmap_map_chunk(l1pt, pd->pd_va, pd->pd_pa, pd->pd_size,
		    VM_PROT_READ | VM_PROT_WRITE, PTE_DEVICE);
#endif
#elif defined(__aarch64__) || defined(__riscv)
		pmap_kenter_device(pd->pd_va, pd->pd_size, pd->pd_pa);
#endif
	}
}

/*
 * Look up the given physical address in the static mapping data and return the
 * corresponding virtual address, or NULL if not found.
 */
void *
devmap_ptov(vm_paddr_t pa, vm_size_t size)
{
	const struct devmap_entry *pd;

if (devmap_table == NULL)
		return (NULL);

for (pd = devmap_table; pd->pd_size != 0; ++pd) {
		if (pa >= pd->pd_pa && pa + size <= pd->pd_pa + pd->pd_size)
			return ((void *)(pd->pd_va + (pa - pd->pd_pa)));
	}

return (NULL);
}

/*
 * Look up the given virtual address in the static mapping data and return the
 * corresponding physical address, or DEVMAP_PADDR_NOTFOUND if not found.
 */
vm_paddr_t
devmap_vtop(void * vpva, vm_size_t size)
{
	const struct devmap_entry *pd;
	vm_offset_t va;

if (devmap_table == NULL)
		return (DEVMAP_PADDR_NOTFOUND);

va = (vm_offset_t)vpva;
	for (pd = devmap_table; pd->pd_size != 0; ++pd) {
		if (va >= pd->pd_va && va + size <= pd->pd_va + pd->pd_size)
			return ((vm_paddr_t)(pd->pd_pa + (va - pd->pd_va)));
	}

return (DEVMAP_PADDR_NOTFOUND);
}

/*
 * Map a set of physical memory pages into the kernel virtual address space.
 * Return a pointer to where it is mapped.
 *
 * This uses a pre-established static mapping if one exists for the requested
 * range, otherwise it allocates kva space and maps the physical pages into it.
 *
 * This routine is intended to be used for mapping device memory, NOT real
 * memory; the mapping type is inherently VM_MEMATTR_DEVICE in
 * pmap_kenter_device().
 */
void *
pmap_mapdev(vm_offset_t pa, vm_size_t size)
{
	vm_offset_t va, offset;
	void * rva;

/* First look in the static mapping table. */
	if ((rva = devmap_ptov(pa, size)) != NULL)
		return (rva);

offset = pa & PAGE_MASK;
	pa = trunc_page(pa);
	size = round_page(size + offset);

#if defined(__aarch64__) || defined(__riscv)
	if (early_boot) {
		akva_devmap_vaddr = trunc_page(akva_devmap_vaddr - size);
		va = akva_devmap_vaddr;
		KASSERT(va >= VM_MAX_KERNEL_ADDRESS - PMAP_MAPDEV_EARLY_SIZE,
		    ("Too many early devmap mappings"));
	} else
#endif
		va = kva_alloc(size);
	if (!va)
		panic("pmap_mapdev: Couldn't alloc kernel virtual memory");

pmap_kenter_device(va, size, pa);

return ((void *)(va + offset));
}

#if defined(__aarch64__)
void *
pmap_mapdev_attr(vm_offset_t pa, vm_size_t size, vm_memattr_t ma)
{
	vm_offset_t va, offset;
	void * rva;

/* First look in the static mapping table. */
	if ((rva = devmap_ptov(pa, size)) != NULL)
		return (rva);

offset = pa & PAGE_MASK;
	pa = trunc_page(pa);
	size = round_page(size + offset);

if (early_boot) {
		akva_devmap_vaddr = trunc_page(akva_devmap_vaddr - size);
		va = akva_devmap_vaddr;
		KASSERT(va >= (VM_MAX_KERNEL_ADDRESS - (PMAP_MAPDEV_EARLY_SIZE)),
		    ("Too many early devmap mappings 2"));
	} else
		va = kva_alloc(size);
	if (!va)
		panic("pmap_mapdev: Couldn't alloc kernel virtual memory");

pmap_kenter(va, size, pa, ma);

return ((void *)(va + offset));
}
#endif

/*
 * Unmap device memory and free the kva space.
 */
void
pmap_unmapdev(vm_offset_t va, vm_size_t size)
{
	vm_offset_t offset;

/* Nothing to do if we find the mapping in the static table. */
	if (devmap_vtop((void*)va, size) != DEVMAP_PADDR_NOTFOUND)
		return;

offset = va & PAGE_MASK;
	va = trunc_page(va);
	size = round_page(size + offset);

pmap_kremove_device(va, size);
	kva_free(va, size);
}

#ifdef DDB
#include <ddb/ddb.h>

DB_SHOW_COMMAND(devmap, db_show_devmap)
{
	devmap_dump_table(db_printf);
}

#endif /* DDB */

003 File Manager

Editing: subr_devmap.c

Upload File

Create Folder