arch/powerpc/include/asm/prom.h

   1 #ifndef _POWERPC_PROM_H
   2 #define _POWERPC_PROM_H
   3 #ifdef __KERNEL__
   4
   5 /*
   6  * Definitions for talking to the Open Firmware PROM on
   7  * Power Macintosh computers.
   8  *
   9  * Copyright (C) 1996-2005 Paul Mackerras.
  10  *
  11  * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version
  16  * 2 of the License, or (at your option) any later version.
  17  */
  18 #include <linux/types.h>
  19 #include <asm/irq.h>
  20 #include <linux/atomic.h>
  21
  22 /* These includes should be removed once implicit includes are cleaned up. */
  23 #include <linux/of.h>
  24 #include <linux/of_fdt.h>
  25 #include <linux/of_address.h>
  26 #include <linux/of_irq.h>
  27 #include <linux/platform_device.h>
  28
  29 #define OF_DT_BEGIN_NODE        0x1             /* Start of node, full name */
  30 #define OF_DT_END_NODE          0x2             /* End node */
  31 #define OF_DT_PROP              0x3             /* Property: name off, size,
  32                                                  * content */
  33 #define OF_DT_NOP               0x4             /* nop */
  34 #define OF_DT_END               0x9
  35
  36 #define OF_DT_VERSION           0x10
  37
  38 /*
  39  * This is what gets passed to the kernel by prom_init or kexec
  40  *
  41  * The dt struct contains the device tree structure, full pathes and
  42  * property contents. The dt strings contain a separate block with just
  43  * the strings for the property names, and is fully page aligned and
  44  * self contained in a page, so that it can be kept around by the kernel,
  45  * each property name appears only once in this page (cheap compression)
  46  *
  47  * the mem_rsvmap contains a map of reserved ranges of physical memory,
  48  * passing it here instead of in the device-tree itself greatly simplifies
  49  * the job of everybody. It's just a list of u64 pairs (base/size) that
  50  * ends when size is 0
  51  */
  52 struct boot_param_header {
  53         __be32  magic;                  /* magic word OF_DT_HEADER */
  54         __be32  totalsize;              /* total size of DT block */
  55         __be32  off_dt_struct;          /* offset to structure */
  56         __be32  off_dt_strings;         /* offset to strings */
  57         __be32  off_mem_rsvmap;         /* offset to memory reserve map */
  58         __be32  version;                /* format version */
  59         __be32  last_comp_version;      /* last compatible version */
  60         /* version 2 fields below */
  61         __be32  boot_cpuid_phys;        /* Physical CPU id we're booting on */
  62         /* version 3 fields below */
  63         __be32  dt_strings_size;        /* size of the DT strings block */
  64         /* version 17 fields below */
  65         __be32  dt_struct_size;         /* size of the DT structure block */
  66 };
  67
  68 /*
  69  * OF address retreival & translation
  70  */
  71
  72 /* Parse the ibm,dma-window property of an OF node into the busno, phys and
  73  * size parameters.
  74  */
  75 void of_parse_dma_window(struct device_node *dn, const __be32 *dma_window,
  76                          unsigned long *busno, unsigned long *phys,
  77                          unsigned long *size);
  78
  79 extern void kdump_move_device_tree(void);
  80
  81 extern void of_instantiate_rtc(void);
  82
  83 extern int of_get_ibm_chip_id(struct device_node *np);
  84
  85 /* The of_drconf_cell struct defines the layout of the LMB array
  86  * specified in the device tree property
  87  * ibm,dynamic-reconfiguration-memory/ibm,dynamic-memory
  88  */
  89 struct of_drconf_cell {
  90         u64     base_addr;
  91         u32     drc_index;
  92         u32     reserved;
  93         u32     aa_index;
  94         u32     flags;
  95 };
  96
  97 #define DRCONF_MEM_ASSIGNED     0x00000008
  98 #define DRCONF_MEM_AI_INVALID   0x00000040
  99 #define DRCONF_MEM_RESERVED     0x00000080
 100
 101 /*
 102  * There are two methods for telling firmware what our capabilities are.
 103  * Newer machines have an "ibm,client-architecture-support" method on the
 104  * root node.  For older machines, we have to call the "process-elf-header"
 105  * method in the /packages/elf-loader node, passing it a fake 32-bit
 106  * ELF header containing a couple of PT_NOTE sections that contain
 107  * structures that contain various information.
 108  */
 109
 110 /* New method - extensible architecture description vector. */
 111
 112 /* Option vector bits - generic bits in byte 1 */
 113 #define OV_IGNORE               0x80    /* ignore this vector */
 114 #define OV_CESSATION_POLICY     0x40    /* halt if unsupported option present*/
 115
 116 /* Option vector 1: processor architectures supported */
 117 #define OV1_PPC_2_00            0x80    /* set if we support PowerPC 2.00 */
 118 #define OV1_PPC_2_01            0x40    /* set if we support PowerPC 2.01 */
 119 #define OV1_PPC_2_02            0x20    /* set if we support PowerPC 2.02 */
 120 #define OV1_PPC_2_03            0x10    /* set if we support PowerPC 2.03 */
 121 #define OV1_PPC_2_04            0x08    /* set if we support PowerPC 2.04 */
 122 #define OV1_PPC_2_05            0x04    /* set if we support PowerPC 2.05 */
 123 #define OV1_PPC_2_06            0x02    /* set if we support PowerPC 2.06 */
 124 #define OV1_PPC_2_07            0x01    /* set if we support PowerPC 2.07 */
 125
 126 /* Option vector 2: Open Firmware options supported */
 127 #define OV2_REAL_MODE           0x20    /* set if we want OF in real mode */
 128
 129 /* Option vector 3: processor options supported */
 130 #define OV3_FP                  0x80    /* floating point */
 131 #define OV3_VMX                 0x40    /* VMX/Altivec */
 132 #define OV3_DFP                 0x20    /* decimal FP */
 133
 134 /* Option vector 4: IBM PAPR implementation */
 135 #define OV4_MIN_ENT_CAP         0x01    /* minimum VP entitled capacity */
 136
 137 /* Option vector 5: PAPR/OF options supported
 138  * These bits are also used in firmware_has_feature() to validate
 139  * the capabilities reported for vector 5 in the device tree so we
 140  * encode the vector index in the define and use the OV5_FEAT()
 141  * and OV5_INDX() macros to extract the desired information.
 142  */
 143 #define OV5_FEAT(x)     ((x) & 0xff)
 144 #define OV5_INDX(x)     ((x) >> 8)
 145 #define OV5_LPAR                0x0280  /* logical partitioning supported */
 146 #define OV5_SPLPAR              0x0240  /* shared-processor LPAR supported */
 147 /* ibm,dynamic-reconfiguration-memory property supported */
 148 #define OV5_DRCONF_MEMORY       0x0220
 149 #define OV5_LARGE_PAGES         0x0210  /* large pages supported */
 150 #define OV5_DONATE_DEDICATE_CPU 0x0202  /* donate dedicated CPU support */
 151 #define OV5_MSI                 0x0201  /* PCIe/MSI support */
 152 #define OV5_CMO                 0x0480  /* Cooperative Memory Overcommitment */
 153 #define OV5_XCMO                0x0440  /* Page Coalescing */
 154 #define OV5_TYPE1_AFFINITY      0x0580  /* Type 1 NUMA affinity */
 155 #define OV5_PRRN                0x0540  /* Platform Resource Reassignment */
 156 #define OV5_PFO_HW_RNG          0x0E80  /* PFO Random Number Generator */
 157 #define OV5_PFO_HW_842          0x0E40  /* PFO Compression Accelerator */
 158 #define OV5_PFO_HW_ENCR         0x0E20  /* PFO Encryption Accelerator */
 159 #define OV5_SUB_PROCESSORS      0x0F01  /* 1,2,or 4 Sub-Processors supported */
 160
 161 /* Option Vector 6: IBM PAPR hints */
 162 #define OV6_LINUX               0x02    /* Linux is our OS */
 163
 164 /*
 165  * The architecture vector has an array of PVR mask/value pairs,
 166  * followed by # option vectors - 1, followed by the option vectors.
 167  */
 168 extern unsigned char ibm_architecture_vec[];
 169
 170 #endif /* __KERNEL__ */
 171 #endif /* _POWERPC_PROM_H */