arch/x86/include/asm/imr.h

   1 /*
   2  * imr.h: Isolated Memory Region API
   3  *
   4  * Copyright(c) 2013 Intel Corporation.
   5  * Copyright(c) 2015 Bryan O'Donoghue <pure.logic@nexus-software.ie>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; version 2
  10  * of the License.
  11  */
  12 #ifndef _IMR_H
  13 #define _IMR_H
  14
  15 #include <linux/types.h>
  16
  17 /*
  18  * IMR agent access mask bits
  19  * See section 12.7.4.7 from quark-x1000-datasheet.pdf for register
  20  * definitions.
  21  */
  22 #define IMR_ESRAM_FLUSH         BIT(31)
  23 #define IMR_CPU_SNOOP           BIT(30)         /* Applicable only to write */
  24 #define IMR_RMU                 BIT(29)
  25 #define IMR_VC1_SAI_ID3         BIT(15)
  26 #define IMR_VC1_SAI_ID2         BIT(14)
  27 #define IMR_VC1_SAI_ID1         BIT(13)
  28 #define IMR_VC1_SAI_ID0         BIT(12)
  29 #define IMR_VC0_SAI_ID3         BIT(11)
  30 #define IMR_VC0_SAI_ID2         BIT(10)
  31 #define IMR_VC0_SAI_ID1         BIT(9)
  32 #define IMR_VC0_SAI_ID0         BIT(8)
  33 #define IMR_CPU_0               BIT(1)          /* SMM mode */
  34 #define IMR_CPU                 BIT(0)          /* Non SMM mode */
  35 #define IMR_ACCESS_NONE         0
  36
  37 /*
  38  * Read/Write access-all bits here include some reserved bits
  39  * These are the values firmware uses and are accepted by hardware.
  40  * The kernel defines read/write access-all in the same way as firmware
  41  * in order to have a consistent and crisp definition across firmware,
  42  * bootloader and kernel.
  43  */
  44 #define IMR_READ_ACCESS_ALL     0xBFFFFFFF
  45 #define IMR_WRITE_ACCESS_ALL    0xFFFFFFFF
  46
  47 /* Number of IMRs provided by Quark X1000 SoC */
  48 #define QUARK_X1000_IMR_MAX     0x08
  49 #define QUARK_X1000_IMR_REGBASE 0x40
  50
  51 /* IMR alignment bits - only bits 31:10 are checked for IMR validity */
  52 #define IMR_ALIGN               0x400
  53 #define IMR_MASK                (IMR_ALIGN - 1)
  54
  55 int imr_add_range(phys_addr_t base, size_t size,
  56                   unsigned int rmask, unsigned int wmask, bool lock);
  57
  58 int imr_remove_range(phys_addr_t base, size_t size);
  59
  60 #endif /* _IMR_H */