patch-2.4.6 linux/drivers/acpi/executer/exregion.c

• Lines: 410
• Date: Wed Jun 20 17:47:40 2001
• Orig file: v2.4.5/linux/drivers/acpi/executer/exregion.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/drivers/acpi/executer/exregion.c linux/drivers/acpi/executer/exregion.c
@@ -0,0 +1,409 @@
+
+/******************************************************************************
+ *
+ * Module Name: exregion - ACPI default Op_region (address space) handlers
+ *              $Revision: 48 $
+ *
+ *****************************************************************************/
+
+/*
+ *  Copyright (C) 2000, 2001 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 "acinterp.h"
+#include "amlcode.h"
+#include "acnamesp.h"
+#include "achware.h"
+#include "acevents.h"
+
+
+#define _COMPONENT          ACPI_EXECUTER
+	 MODULE_NAME         ("exregion")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    Acpi_ex_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
+ *              Handler_context     - Pointer to Handler's context
+ *              Region_context      - Pointer to context specific to the
+ *                                      accessed region
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Handler for the System Memory address space (Op Region)
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_ex_system_memory_space_handler (
+	u32                     function,
+	ACPI_PHYSICAL_ADDRESS   address,
+	u32                     bit_width,
+	u32                     *value,
+	void                    *handler_context,
+	void                    *region_context)
+{
+	ACPI_STATUS             status = AE_OK;
+	void                    *logical_addr_ptr = NULL;
+	ACPI_MEM_SPACE_CONTEXT  *mem_info = region_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 ((address < mem_info->mapped_physical_address) ||
+		(((ACPI_INTEGER) address + length) >
+			((ACPI_INTEGER) 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 (address, SYSMEM_REGION_WINDOW_SIZE,
+				  (void **) &mem_info->mapped_logical_address);
+		if (ACPI_FAILURE (status)) {
+			return (status);
+		}
+
+		/* TBD: should these pointers go to 64-bit in all cases ? */
+
+		mem_info->mapped_physical_address = address;
+		mem_info->mapped_length = SYSMEM_REGION_WINDOW_SIZE;
+	}
+
+
+	/*
+	 * Generate a logical pointer corresponding to the address we want to
+	 * access
+	 */
+
+	/* TBD: should these pointers go to 64-bit in all cases ? */
+
+	logical_addr_ptr = mem_info->mapped_logical_address +
+			  ((ACPI_INTEGER) address - (ACPI_INTEGER) mem_info->mapped_physical_address);
+
+	/* Perform the memory read or write */
+
+	switch (function) {
+
+	case ACPI_READ_ADR_SPACE:
+
+		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 ACPI_WRITE_ADR_SPACE:
+
+		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_ex_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
+ *              Handler_context     - Pointer to Handler's context
+ *              Region_context      - Pointer to context specific to the
+ *                                      accessed region
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Handler for the System IO address space (Op Region)
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_ex_system_io_space_handler (
+	u32                     function,
+	ACPI_PHYSICAL_ADDRESS   address,
+	u32                     bit_width,
+	u32                     *value,
+	void                    *handler_context,
+	void                    *region_context)
+{
+	ACPI_STATUS             status = AE_OK;
+
+
+	/* Decode the function parameter */
+
+	switch (function) {
+
+	case ACPI_READ_ADR_SPACE:
+
+		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 ACPI_WRITE_ADR_SPACE:
+
+		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_ex_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
+ *              Handler_context     - Pointer to Handler's context
+ *              Region_context      - Pointer to context specific to the
+ *                                      accessed region
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Handler for the PCI Config address space (Op Region)
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_ex_pci_config_space_handler (
+	u32                     function,
+	ACPI_PHYSICAL_ADDRESS   address,
+	u32                     bit_width,
+	u32                     *value,
+	void                    *handler_context,
+	void                    *region_context)
+{
+	ACPI_STATUS             status = AE_OK;
+	u32                     pci_bus;
+	u32                     dev_func;
+	u8                      pci_reg;
+	ACPI_PCI_SPACE_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 = (ACPI_PCI_SPACE_CONTEXT *) region_context;
+
+	pci_bus = LOWORD (PCIcontext->seg) << 16;
+	pci_bus |= LOWORD (PCIcontext->bus);
+
+	dev_func = PCIcontext->dev_func;
+
+	pci_reg = (u8) address;
+
+	switch (function) {
+
+	case ACPI_READ_ADR_SPACE:
+
+		*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 ACPI_WRITE_ADR_SPACE:
+
+		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);
+}
+