arch/x86/include/asm/imr.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * imr.h: Isolated Memory Region API
   4  *
   5  * Copyright(c) 2013 Intel Corporation.
   6  * Copyright(c) 2015 Bryan O'Donoghue <pure.logic@nexus-software.ie>
   7  */
   8 #ifndef _IMR_H
   9 #define _IMR_H
  10
  11 #include <linux/types.h>
  12
  13 /*
  14  * IMR agent access mask bits
  15  * See section 12.7.4.7 from quark-x1000-datasheet.pdf for register
  16  * definitions.
  17  */
  18 #define IMR_ESRAM_FLUSH         BIT(31)
  19 #define IMR_CPU_SNOOP           BIT(30)         /* Applicable only to write */
  20 #define IMR_RMU                 BIT(29)
  21 #define IMR_VC1_SAI_ID3         BIT(15)
  22 #define IMR_VC1_SAI_ID2         BIT(14)
  23 #define IMR_VC1_SAI_ID1         BIT(13)
  24 #define IMR_VC1_SAI_ID0         BIT(12)
  25 #define IMR_VC0_SAI_ID3         BIT(11)
  26 #define IMR_VC0_SAI_ID2         BIT(10)
  27 #define IMR_VC0_SAI_ID1         BIT(9)
  28 #define IMR_VC0_SAI_ID0         BIT(8)
  29 #define IMR_CPU_0               BIT(1)          /* SMM mode */
  30 #define IMR_CPU                 BIT(0)          /* Non SMM mode */
  31 #define IMR_ACCESS_NONE         0
  32
  33 /*
  34  * Read/Write access-all bits here include some reserved bits
  35  * These are the values firmware uses and are accepted by hardware.
  36  * The kernel defines read/write access-all in the same way as firmware
  37  * in order to have a consistent and crisp definition across firmware,
  38  * bootloader and kernel.
  39  */
  40 #define IMR_READ_ACCESS_ALL     0xBFFFFFFF
  41 #define IMR_WRITE_ACCESS_ALL    0xFFFFFFFF
  42
  43 /* Number of IMRs provided by Quark X1000 SoC */
  44 #define QUARK_X1000_IMR_MAX     0x08
  45 #define QUARK_X1000_IMR_REGBASE 0x40
  46
  47 /* IMR alignment bits - only bits 31:10 are checked for IMR validity */
  48 #define IMR_ALIGN               0x400
  49 #define IMR_MASK                (IMR_ALIGN - 1)
  50
  51 int imr_add_range(phys_addr_t base, size_t size,
  52                   unsigned int rmask, unsigned int wmask);
  53
  54 int imr_remove_range(phys_addr_t base, size_t size);
  55
  56 #endif /* _IMR_H */