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kernel/linux-rt-4.4.41/arch/mips/include/asm/octeon/cvmx-sysinfo.h 4.71 KB
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  /***********************license start***************
   * Author: Cavium Networks
   *
   * Contact: support@caviumnetworks.com
   * This file is part of the OCTEON SDK
   *
   * Copyright (c) 2003-2008 Cavium Networks
   *
   * This file is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License, Version 2, as
   * published by the Free Software Foundation.
   *
   * This file is distributed in the hope that it will be useful, but
   * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
   * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
   * NONINFRINGEMENT.  See the GNU General Public License for more
   * details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this file; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
   * or visit http://www.gnu.org/licenses/.
   *
   * This file may also be available under a different license from Cavium.
   * Contact Cavium Networks for more information
   ***********************license end**************************************/
  
  /*
   * This module provides system/board information obtained by the bootloader.
   */
  
  #ifndef __CVMX_SYSINFO_H__
  #define __CVMX_SYSINFO_H__
  
  #define OCTEON_SERIAL_LEN 20
  /**
   * Structure describing application specific information.
   * __cvmx_app_init() populates this from the cvmx boot descriptor.
   * This structure is private to simple executive applications, so
   * no versioning is required.
   *
   * This structure must be provided with some fields set in order to
   * use simple executive functions in other applications (Linux kernel,
   * u-boot, etc.)  The cvmx_sysinfo_minimal_initialize() function is
   * provided to set the required values in these cases.
   */
  struct cvmx_sysinfo {
  	/* System wide variables */
  	/* installed DRAM in system, in bytes */
  	uint64_t system_dram_size;
  
  	/* ptr to memory descriptor block */
  	void *phy_mem_desc_ptr;
  
  
  	/* Application image specific variables */
  	/* stack top address (virtual) */
  	uint64_t stack_top;
  	/* heap base address (virtual) */
  	uint64_t heap_base;
  	/* stack size in bytes */
  	uint32_t stack_size;
  	/* heap size in bytes */
  	uint32_t heap_size;
  	/* coremask defining cores running application */
  	uint32_t core_mask;
  	/* Deprecated, use cvmx_coremask_first_core() to select init core */
  	uint32_t init_core;
  
  	/* exception base address, as set by bootloader */
  	uint64_t exception_base_addr;
  
  	/* cpu clock speed in hz */
  	uint32_t cpu_clock_hz;
  
  	/* dram data rate in hz (data rate = 2 * clock rate */
  	uint32_t dram_data_rate_hz;
  
  
  	uint16_t board_type;
  	uint8_t board_rev_major;
  	uint8_t board_rev_minor;
  	uint8_t mac_addr_base[6];
  	uint8_t mac_addr_count;
  	char board_serial_number[OCTEON_SERIAL_LEN];
  	/*
  	 * Several boards support compact flash on the Octeon boot
  	 * bus.	 The CF memory spaces may be mapped to different
  	 * addresses on different boards.  These values will be 0 if
  	 * CF is not present.  Note that these addresses are physical
  	 * addresses, and it is up to the application to use the
  	 * proper addressing mode (XKPHYS, KSEG0, etc.)
  	 */
  	uint64_t compact_flash_common_base_addr;
  	uint64_t compact_flash_attribute_base_addr;
  	/*
  	 * Base address of the LED display (as on EBT3000 board) This
  	 * will be 0 if LED display not present.  Note that this
  	 * address is a physical address, and it is up to the
  	 * application to use the proper addressing mode (XKPHYS,
  	 * KSEG0, etc.)
  	 */
  	uint64_t led_display_base_addr;
  	/* DFA reference clock in hz (if applicable)*/
  	uint32_t dfa_ref_clock_hz;
  	/* configuration flags from bootloader */
  	uint32_t bootloader_config_flags;
  
  	/* Uart number used for console */
  	uint8_t console_uart_num;
  };
  
  /**
   * This function returns the system/board information as obtained
   * by the bootloader.
   *
   *
   * Returns  Pointer to the boot information structure
   *
   */
  
  extern struct cvmx_sysinfo *cvmx_sysinfo_get(void);
  
  /**
   * This function is used in non-simple executive environments (such as
   * Linux kernel, u-boot, etc.)	to configure the minimal fields that
   * are required to use simple executive files directly.
   *
   * Locking (if required) must be handled outside of this
   * function
   *
   * @phy_mem_desc_ptr: Pointer to global physical memory descriptor
   *		     (bootmem descriptor) @board_type: Octeon board
   *		     type enumeration
   *
   * @board_rev_major:
   *		     Board major revision
   * @board_rev_minor:
   *		     Board minor revision
   * @cpu_clock_hz:
   *		     CPU clock freqency in hertz
   *
   * Returns 0: Failure
   *	   1: success
   */
  extern int cvmx_sysinfo_minimal_initialize(void *phy_mem_desc_ptr,
  					   uint16_t board_type,
  					   uint8_t board_rev_major,
  					   uint8_t board_rev_minor,
  					   uint32_t cpu_clock_hz);
  
  #endif /* __CVMX_SYSINFO_H__ */