C++ pmap_mapdev函数代码示例

int
bus_space_map(bus_space_tag_t bst, bus_addr_t addr, bus_size_t size,
    int flags __unused, bus_space_handle_t *bshp)
{

        *bshp = (__predict_false(bst == IA64_BUS_SPACE_IO))
            ? addr : (uintptr_t)pmap_mapdev(addr, size);
        return (0);
}

/*
 * Implementation of bus_space_map(), which effectively is a thin
 * wrapper around pmap_mapdev() for memory mapped I/O space. It's
 * implemented here and not in <x86/bus.h> to avoid pollution.
 */
int
bus_space_map(bus_space_tag_t tag, bus_addr_t addr, bus_size_t size,
    int flags __unused, bus_space_handle_t *bshp)
{

	*bshp = (tag == X86_BUS_SPACE_MEM)
	    ? (uintptr_t)pmap_mapdev(addr, size)
	    : addr;
	return (0);
}

static void
xbox_remap(void *unused)
{
	struct fb_info *info;

	if (!arch_i386_is_xbox)
		return;

	info = &xboxfb_info;
	info->fb_vbase = (intptr_t)pmap_mapdev(info->fb_pbase, info->fb_size);
}

static vm_offset_t
s3lfb_map_buffer(u_int paddr, size_t size)
{
	vm_offset_t vaddr;
	u_int off;

	off = paddr - trunc_page(paddr);
	vaddr = (vm_offset_t)pmap_mapdev(paddr - off, size + off);

	return (vaddr + off);
}

int
i80321_mem_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
    bus_space_handle_t *bshp)
{
	vm_paddr_t pa, endpa;

	pa = trunc_page(bpa);
	endpa = round_page(bpa + size);

	*bshp = (vm_offset_t)pmap_mapdev(pa, endpa - pa);
		
	return (0);
}

static int
uninorth_attach(device_t dev)
{
	struct		uninorth_softc *sc;
	const char	*compatible;
	phandle_t	node;
	uint32_t	reg[3];
	uint64_t	regbase;
	cell_t		acells;

	node = ofw_bus_get_node(dev);
	sc = device_get_softc(dev);

	if (OF_getprop(node, "reg", reg, sizeof(reg)) < 8)
		return (ENXIO);

	sc->sc_ver = 0;
	compatible = ofw_bus_get_compat(dev);
	if (strcmp(compatible, "u3-agp") == 0)
		sc->sc_ver = 3;
	if (strcmp(compatible, "u4-pcie") == 0)
		sc->sc_ver = 4;

	acells = 1;
	OF_getprop(OF_parent(node), "#address-cells", &acells, sizeof(acells));

	regbase = reg[0];
	if (acells == 2) {
		regbase <<= 32;
		regbase |= reg[1];
	}

	sc->sc_addr = (vm_offset_t)pmap_mapdev(regbase + 0x800000, PAGE_SIZE);
	sc->sc_data = (vm_offset_t)pmap_mapdev(regbase + 0xc00000, PAGE_SIZE);

	return (ofw_pci_attach(dev));
}

static int
pxa_smi_activate_resource(device_t dev, device_t child, int type, int rid,
    struct resource *r)
{
	struct	pxa_smi_softc *sc;

	sc = (struct pxa_smi_softc *)device_get_softc(dev);

	if (type == SYS_RES_IRQ)
		return (bus_activate_resource(dev, SYS_RES_IRQ, rid, r));

	rman_set_bushandle(r, (bus_space_handle_t)pmap_mapdev(rman_get_start(r),
	    rman_get_size(r)));
	return (rman_activate_resource(r));
}

static int
nexus_activate_resource(device_t bus, device_t child, int type, int rid,
    struct resource *r)
{
	int err;
	bus_addr_t paddr;
	bus_size_t psize;
	bus_space_handle_t vaddr;

	if ((err = rman_activate_resource(r)) != 0)
		return (err);

	/*
	 * If this is a memory resource, map it into the kernel.
	 */
	if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
		paddr = (bus_addr_t)rman_get_start(r);
		psize = (bus_size_t)rman_get_size(r);
#ifdef FDT
		err = bus_space_map(fdtbus_bs_tag, paddr, psize, 0, &vaddr);
		if (err != 0) {
			rman_deactivate_resource(r);
			return (err);
		}
		rman_set_bustag(r, fdtbus_bs_tag);
#else
		vaddr = (bus_space_handle_t)pmap_mapdev((vm_offset_t)paddr,
		    (vm_size_t)psize);
		if (vaddr == 0) {
			rman_deactivate_resource(r);
			return (ENOMEM);
		}
		rman_set_bustag(r, (void *)1);
#endif
		rman_set_virtual(r, (void *)vaddr);
		rman_set_bushandle(r, vaddr);
		return (0);
	} else if (type == SYS_RES_IRQ) {
#ifdef INTRNG
		err = intr_activate_irq(child, r);
		if (err != 0) {
			rman_deactivate_resource(r);
			return (err);
		}
#endif
	}
	return (0);
}

int
generic_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
    bus_space_handle_t *bshp)
{
	void *va;

	/*
	 * We don't even examine the passed-in flags.  For ARM, the CACHEABLE
	 * flag doesn't make sense (we create PTE_DEVICE mappings), and the
	 * LINEAR flag is just implied because we use kva_alloc(size).
	 */
	if ((va = pmap_mapdev(bpa, size)) == NULL)
		return (ENOMEM);
	*bshp = (bus_space_handle_t)va;
	return (0);
}

/*
 * Initialize the local APIC on the BSP.
 */
static int
madt_setup_local(void)
{

	madt = pmap_mapdev(madt_physaddr, madt_length);
	lapic_init((uintptr_t)madt->LocalApicAddress);
	printf("ACPI APIC Table: <%.*s %.*s>\n",
	    (int)sizeof(madt->Header.OemId), madt->Header.OemId,
	    (int)sizeof(madt->Header.OemTableId), madt->Header.OemTableId);

	/*
	 * We ignore 64-bit local APIC override entries.  Should we
	 * perhaps emit a warning here if we find one?
	 */
	return (0);
}

static int
nexus_activate_resource(device_t bus, device_t child, int type, int rid,
			struct resource *r)
{
#ifdef PC98
	bus_space_handle_t bh;
	int error;
#endif
	void *vaddr;

	/*
	 * If this is a memory resource, map it into the kernel.
	 */
	switch (type) {
	case SYS_RES_IOPORT:
#ifdef PC98
		error = i386_bus_space_handle_alloc(X86_BUS_SPACE_IO,
		    rman_get_start(r), rman_get_size(r), &bh);
		if (error)
			return (error);
		rman_set_bushandle(r, bh);
#else
		rman_set_bushandle(r, rman_get_start(r));
#endif
		rman_set_bustag(r, X86_BUS_SPACE_IO);
		break;
	case SYS_RES_MEMORY:
#ifdef PC98
		error = i386_bus_space_handle_alloc(X86_BUS_SPACE_MEM,
		    rman_get_start(r), rman_get_size(r), &bh);
		if (error)
			return (error);
#endif
		vaddr = pmap_mapdev(rman_get_start(r), rman_get_size(r));
		rman_set_virtual(r, vaddr);
		rman_set_bustag(r, X86_BUS_SPACE_MEM);
#ifdef PC98
		/* PC-98: the type of bus_space_handle_t is the structure. */
		bh->bsh_base = (bus_addr_t) vaddr;
		rman_set_bushandle(r, bh);
#else
		/* IBM-PC: the type of bus_space_handle_t is u_int */
		rman_set_bushandle(r, (bus_space_handle_t) vaddr);
#endif
	}
	return (rman_activate_resource(r));
}

static int
at91_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
    bus_space_handle_t *bshp)
{
	vm_paddr_t pa, endpa;

	pa = trunc_page(bpa);
	if (pa >= 0xfff00000) {
		*bshp = pa - 0xf0000000 + 0xd0000000;
		return (0);
	}
	if (pa >= 0xdff00000)
		return (0);
	endpa = round_page(bpa + size);

	*bshp = (vm_offset_t)pmap_mapdev(pa, endpa - pa);
		       
	return (0);
}

static int
uninorth_activate_resource(device_t bus, device_t child, int type, int rid,
    struct resource *res)
{
	void	*p;

	if (type == SYS_RES_IRQ)
		return (bus_activate_resource(bus, type, rid, res));

	if (type == SYS_RES_MEMORY) {
		p = pmap_mapdev((vm_offset_t)rman_get_start(res),
		    (vm_size_t)rman_get_size(res));
		if (p == NULL)
			return (ENOMEM);
		rman_set_virtual(res, p);
		rman_set_bushandle(res, (u_long)p);
	}

	return (rman_activate_resource(res));
}

static int
bs_gen_map(bus_addr_t addr, bus_size_t size __unused, int flags __unused,
    bus_space_handle_t *bshp)
{
	/*
	 * Record what we did if we haven't enabled the MMU yet. We
	 * will need to remap it as soon as the MMU comes up.
	 */
	if (!pmap_bootstrapped) {
		KASSERT(earlyboot_map_idx < MAX_EARLYBOOT_MAPPINGS,
		    ("%s: too many early boot mapping requests", __func__));
		earlyboot_mappings[earlyboot_map_idx].addr = addr;
		earlyboot_mappings[earlyboot_map_idx].size = size;
		earlyboot_map_idx++;
		*bshp = addr;
	} else {
		*bshp = (bus_space_handle_t)pmap_mapdev(addr,size);
	}

	return (0);
}

static int
at91_bs_map(bus_space_tag_t tag, bus_addr_t bpa, bus_size_t size, int flags,
            bus_space_handle_t *bshp)
{
    vm_paddr_t pa, endpa;

    pa = trunc_page(bpa);
    if (pa >= AT91_PA_BASE + 0xff00000) {
        *bshp = bpa - AT91_PA_BASE + AT91_BASE;
        return (0);
    }
    if (pa >= AT91_BASE + 0xff00000) {
        *bshp = bpa;
        return (0);
    }
    endpa = round_page(bpa + size);

    *bshp = (vm_offset_t)pmap_mapdev(pa, endpa - pa) + (bpa - pa);

    return (0);
}