summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/interpreter/amregion.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi/interpreter/amregion.c')
-rw-r--r--drivers/acpi/interpreter/amregion.c406
1 files changed, 406 insertions, 0 deletions
diff --git a/drivers/acpi/interpreter/amregion.c b/drivers/acpi/interpreter/amregion.c
new file mode 100644
index 000000000..9a44daab2
--- /dev/null
+++ b/drivers/acpi/interpreter/amregion.c
@@ -0,0 +1,406 @@
+/******************************************************************************
+ *
+ * Module Name: amregion - ACPI default Op_region (address space) handlers
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 R. Byron Moore
+ *
+ * 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 "acpi.h"
+#include "interp.h"
+#include "amlcode.h"
+#include "namesp.h"
+#include "hardware.h"
+#include "events.h"
+
+
+#define _COMPONENT INTERPRETER
+ MODULE_NAME ("amregion");
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: Acpi_aml_system_memory_space_handler
+ *
+ * PARAMETERS: Function - Read or Write operation
+ * Address - Where in the space to read or write
+ * Bit_width - Field width in bits (8, 16, or 32)
+ * Value - Pointer to in or out value
+ * Context - Context pointer
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Handler for the System Memory address space (Op Region)
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_aml_system_memory_space_handler (
+ u32 function,
+ u32 address, /* TBD: [Future] Should this be A POINTER for 64-bit support? */
+ u32 bit_width,
+ u32 *value,
+ void *context)
+{
+ ACPI_STATUS status = AE_OK;
+ void *logical_addr_ptr = NULL;
+ MEM_HANDLER_CONTEXT *mem_info = context;
+ u32 length;
+
+
+ /* Validate and translate the bit width */
+
+ switch (bit_width)
+ {
+ case 8:
+ length = 1;
+ break;
+
+ case 16:
+ length = 2;
+ break;
+
+ case 32:
+ length = 4;
+ break;
+
+ default:
+ return (AE_AML_OPERAND_VALUE);
+ break;
+ }
+
+
+ /*
+ * Does the request fit into the cached memory mapping?
+ * Is 1) Address below the current mapping? OR
+ * 2) Address beyond the current mapping?
+ */
+
+ if (((char *) address < mem_info->mapped_physical_address) ||
+ (((char *) address + length) >
+ (mem_info->mapped_physical_address + mem_info->mapped_length)))
+ {
+ /*
+ * The request cannot be resolved by the current memory mapping;
+ * Delete the existing mapping and create a new one.
+ */
+
+ if (mem_info->mapped_length) {
+ /* Valid mapping, delete it */
+
+ acpi_os_unmap_memory (mem_info->mapped_logical_address,
+ mem_info->mapped_length);
+ }
+
+ mem_info->mapped_length = 0; /* In case of failure below */
+
+ /* Create a new mapping starting at the address given */
+
+ status = acpi_os_map_memory ((void *) address, SYSMEM_REGION_WINDOW_SIZE,
+ (void **) &mem_info->mapped_logical_address);
+ if (ACPI_FAILURE (status)) {
+ return (status);
+ }
+
+ mem_info->mapped_physical_address = (char *) address;
+ mem_info->mapped_length = SYSMEM_REGION_WINDOW_SIZE;
+ }
+
+
+ /*
+ * Generate a logical pointer corresponding to the address we want to
+ * access
+ */
+
+ logical_addr_ptr = mem_info->mapped_logical_address +
+ ((char *) address - mem_info->mapped_physical_address);
+
+ /* Perform the memory read or write */
+
+ switch (function)
+ {
+
+ case ADDRESS_SPACE_READ:
+
+ switch (bit_width)
+ {
+ case 8:
+ *value = (u32)* (u8 *) logical_addr_ptr;
+ break;
+
+ case 16:
+ MOVE_UNALIGNED16_TO_32 (value, logical_addr_ptr);
+ break;
+
+ case 32:
+ MOVE_UNALIGNED32_TO_32 (value, logical_addr_ptr);
+ break;
+ }
+
+ break;
+
+
+ case ADDRESS_SPACE_WRITE:
+
+ switch (bit_width)
+ {
+ case 8:
+ *(u8 *) logical_addr_ptr = (u8) *value;
+ break;
+
+ case 16:
+ MOVE_UNALIGNED16_TO_16 (logical_addr_ptr, value);
+ break;
+
+ case 32:
+ MOVE_UNALIGNED32_TO_32 (logical_addr_ptr, value);
+ break;
+ }
+
+ break;
+
+
+ default:
+ status = AE_BAD_PARAMETER;
+ break;
+ }
+
+ return (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: Acpi_aml_system_io_space_handler
+ *
+ * PARAMETERS: Function - Read or Write operation
+ * Address - Where in the space to read or write
+ * Bit_width - Field width in bits (8, 16, or 32)
+ * Value - Pointer to in or out value
+ * Context - Context pointer
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Handler for the System IO address space (Op Region)
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_aml_system_io_space_handler (
+ u32 function,
+ u32 address,
+ u32 bit_width,
+ u32 *value,
+ void *context)
+{
+ ACPI_STATUS status = AE_OK;
+
+
+ /* Decode the function parameter */
+
+ switch (function)
+ {
+
+ case ADDRESS_SPACE_READ:
+
+ switch (bit_width)
+ {
+ /* I/O Port width */
+
+ case 8:
+ *value = (u32) acpi_os_in8 ((ACPI_IO_ADDRESS) address);
+ break;
+
+ case 16:
+ *value = (u32) acpi_os_in16 ((ACPI_IO_ADDRESS) address);
+ break;
+
+ case 32:
+ *value = acpi_os_in32 ((ACPI_IO_ADDRESS) address);
+ break;
+
+ default:
+ status = AE_AML_OPERAND_VALUE;
+ }
+
+ break;
+
+
+ case ADDRESS_SPACE_WRITE:
+
+ switch (bit_width)
+ {
+ /* I/O Port width */
+ case 8:
+ acpi_os_out8 ((ACPI_IO_ADDRESS) address, (u8) *value);
+ break;
+
+ case 16:
+ acpi_os_out16 ((ACPI_IO_ADDRESS) address, (u16) *value);
+ break;
+
+ case 32:
+ acpi_os_out32 ((ACPI_IO_ADDRESS) address, *value);
+ break;
+
+ default:
+ status = AE_AML_OPERAND_VALUE;
+ }
+
+ break;
+
+
+ default:
+ status = AE_BAD_PARAMETER;
+ break;
+ }
+
+ return (status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: Acpi_aml_pci_config_space_handler
+ *
+ * PARAMETERS: Function - Read or Write operation
+ * Address - Where in the space to read or write
+ * Bit_width - Field width in bits (8, 16, or 32)
+ * Value - Pointer to in or out value
+ * Context - Context pointer
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Handler for the PCI Config address space (Op Region)
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_aml_pci_config_space_handler (
+ u32 function,
+ u32 address,
+ u32 bit_width,
+ u32 *value,
+ void *context)
+{
+ ACPI_STATUS status = AE_OK;
+ u32 pci_bus;
+ u32 dev_func;
+ u8 pci_reg;
+ PCI_HANDLER_CONTEXT *PCIcontext;
+
+
+ /*
+ * The arguments to Acpi_os(Read|Write)Pci_cfg(Byte|Word|Dword) are:
+ *
+ * Seg_bus - 0xSSSSBBBB - SSSS is the PCI bus segment
+ * BBBB is the PCI bus number
+ *
+ * Dev_func - 0xDDDDFFFF - DDDD is the PCI device number
+ * FFFF is the PCI device function number
+ *
+ * Reg_num - Config space register must be < 40h
+ *
+ * Value - input value for write, output for read
+ *
+ */
+
+ PCIcontext = (PCI_HANDLER_CONTEXT *) context;
+
+ pci_bus = LOWORD(PCIcontext->seg) << 16;
+ pci_bus |= LOWORD(PCIcontext->bus);
+
+ dev_func = PCIcontext->dev_func;
+
+ pci_reg = (u8) address;
+
+ switch (function)
+ {
+
+ case ADDRESS_SPACE_READ:
+
+ *value = 0;
+
+ switch (bit_width)
+ {
+ /* PCI Register width */
+
+ case 8:
+ status = acpi_os_read_pci_cfg_byte (pci_bus, dev_func, pci_reg,
+ (u8 *) value);
+ break;
+
+ case 16:
+ status = acpi_os_read_pci_cfg_word (pci_bus, dev_func, pci_reg,
+ (u16 *) value);
+ break;
+
+ case 32:
+ status = acpi_os_read_pci_cfg_dword (pci_bus, dev_func, pci_reg,
+ value);
+ break;
+
+ default:
+ status = AE_AML_OPERAND_VALUE;
+
+ } /* Switch bit_width */
+
+ break;
+
+
+ case ADDRESS_SPACE_WRITE:
+
+
+ switch (bit_width)
+ {
+ /* PCI Register width */
+
+ case 8:
+ status = acpi_os_write_pci_cfg_byte (pci_bus, dev_func, pci_reg,
+ *(u8 *) value);
+ break;
+
+ case 16:
+ status = acpi_os_write_pci_cfg_word (pci_bus, dev_func, pci_reg,
+ *(u16 *) value);
+ break;
+
+ case 32:
+ status = acpi_os_write_pci_cfg_dword (pci_bus, dev_func, pci_reg,
+ *value);
+ break;
+
+ default:
+ status = AE_AML_OPERAND_VALUE;
+
+ } /* Switch bit_width */
+
+ break;
+
+
+ default:
+
+ status = AE_BAD_PARAMETER;
+ break;
+
+ }
+
+ return (status);
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 08:42:44 +0000