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/*
* acpi_osl.c - OS-dependent functions ($Revision: 83 $)
*
* Copyright (C) 2000 Andrew Henroid
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
*/
#include <asm/io.h>
#include <xen/config.h>
#include <xen/init.h>
#include <xen/pfn.h>
#include <xen/types.h>
#include <xen/errno.h>
#include <xen/acpi.h>
#include <xen/numa.h>
#include <acpi/acmacros.h>
#include <acpi/acpiosxf.h>
#include <acpi/platform/aclinux.h>
#include <xen/spinlock.h>
#include <xen/domain_page.h>
#include <xen/efi.h>
#define _COMPONENT ACPI_OS_SERVICES
ACPI_MODULE_NAME("osl")
#ifdef CONFIG_ACPI_CUSTOM_DSDT
#include CONFIG_ACPI_CUSTOM_DSDT_FILE
#endif
void __init acpi_os_printf(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
acpi_os_vprintf(fmt, args);
va_end(args);
}
void __init acpi_os_vprintf(const char *fmt, va_list args)
{
static char buffer[512];
vsnprintf(buffer, sizeof(buffer), fmt, args);
printk("%s", buffer);
}
acpi_physical_address __init acpi_os_get_root_pointer(void)
{
if (efi_enabled) {
if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
return efi.acpi20;
else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
return efi.acpi;
else {
printk(KERN_ERR PREFIX
"System description tables not found\n");
return 0;
}
} else {
acpi_physical_address pa = 0;
acpi_find_root_pointer(&pa);
return pa;
}
}
static DEFINE_SPINLOCK(map_lock);
void __iomem *
acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
{
if (system_state >= SYS_STATE_active)
spin_lock(&map_lock);
return __acpi_map_table(phys, size);
}
void acpi_os_unmap_memory(void __iomem * virt, acpi_size size)
{
if (system_state >= SYS_STATE_active)
spin_unlock(&map_lock);
}
acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
{
u32 dummy;
if (!value)
value = &dummy;
*value = 0;
if (width <= 8) {
*(u8 *) value = inb(port);
} else if (width <= 16) {
*(u16 *) value = inw(port);
} else if (width <= 32) {
*(u32 *) value = inl(port);
} else {
BUG();
}
return AE_OK;
}
acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
{
if (width <= 8) {
outb(value, port);
} else if (width <= 16) {
outw(value, port);
} else if (width <= 32) {
outl(value, port);
} else {
BUG();
}
return AE_OK;
}
acpi_status
acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
{
u32 dummy;
void __iomem *virt_addr = acpi_os_map_memory(phys_addr, width >> 3);
if (!value)
value = &dummy;
switch (width) {
case 8:
*(u8 *) value = readb(virt_addr);
break;
case 16:
*(u16 *) value = readw(virt_addr);
break;
case 32:
*(u32 *) value = readl(virt_addr);
break;
default:
BUG();
}
acpi_os_unmap_memory(virt_addr, width >> 3);
return AE_OK;
}
acpi_status
acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
{
void __iomem *virt_addr = acpi_os_map_memory(phys_addr, width >> 3);
switch (width) {
case 8:
writeb(value, virt_addr);
break;
case 16:
writew(value, virt_addr);
break;
case 32:
writel(value, virt_addr);
break;
default:
BUG();
}
acpi_os_unmap_memory(virt_addr, width >> 3);
return AE_OK;
}
#define is_xmalloc_memory(ptr) ((unsigned long)(ptr) & (PAGE_SIZE - 1))
void *__init acpi_os_alloc_memory(size_t sz)
{
void *ptr;
if (system_state == SYS_STATE_early_boot)
return mfn_to_virt(alloc_boot_pages(PFN_UP(sz), 1));
ptr = xmalloc_bytes(sz);
ASSERT(!ptr || is_xmalloc_memory(ptr));
return ptr;
}
void *__init acpi_os_zalloc_memory(size_t sz)
{
void *ptr;
if (system_state != SYS_STATE_early_boot) {
ptr = xzalloc_bytes(sz);
ASSERT(!ptr || is_xmalloc_memory(ptr));
return ptr;
}
ptr = acpi_os_alloc_memory(sz);
return ptr ? memset(ptr, 0, sz) : NULL;
}
void __init acpi_os_free_memory(void *ptr)
{
if (is_xmalloc_memory(ptr))
xfree(ptr);
else if (ptr && system_state == SYS_STATE_early_boot)
init_boot_pages(__pa(ptr), __pa(ptr) + PAGE_SIZE);
}
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