hw/lm32_hwsetup.h

   1 /*
   2  *  LatticeMico32 hwsetup helper functions.
   3  *
   4  *  Copyright (c) 2010 Michael Walle <michael@walle.cc>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /*
  21  * These are helper functions for creating the hardware description blob used
  22  * in the Theobroma's uClinux port.
  23  */
  24
  25 #ifndef QEMU_HW_LM32_HWSETUP_H
  26 #define QEMU_HW_LM32_HWSETUP_H
  27
  28 #include "qemu-common.h"
  29 #include "loader.h"
  30
  31 typedef struct {
  32     void *data;
  33     void *ptr;
  34 } HWSetup;
  35
  36 enum hwsetup_tag {
  37     HWSETUP_TAG_EOL         = 0,
  38     HWSETUP_TAG_CPU         = 1,
  39     HWSETUP_TAG_ASRAM       = 2,
  40     HWSETUP_TAG_FLASH       = 3,
  41     HWSETUP_TAG_SDRAM       = 4,
  42     HWSETUP_TAG_OCM         = 5,
  43     HWSETUP_TAG_DDR_SDRAM   = 6,
  44     HWSETUP_TAG_DDR2_SDRAM  = 7,
  45     HWSETUP_TAG_TIMER       = 8,
  46     HWSETUP_TAG_UART        = 9,
  47     HWSETUP_TAG_GPIO        = 10,
  48     HWSETUP_TAG_TRISPEEDMAC = 11,
  49     HWSETUP_TAG_I2CM        = 12,
  50     HWSETUP_TAG_LEDS        = 13,
  51     HWSETUP_TAG_7SEG        = 14,
  52     HWSETUP_TAG_SPI_S       = 15,
  53     HWSETUP_TAG_SPI_M       = 16,
  54 };
  55
  56 static inline HWSetup *hwsetup_init(void)
  57 {
  58     HWSetup *hw;
  59
  60     hw = qemu_malloc(sizeof(HWSetup));
  61     hw->data = qemu_mallocz(TARGET_PAGE_SIZE);
  62     hw->ptr = hw->data;
  63
  64     return hw;
  65 }
  66
  67 static inline void hwsetup_free(HWSetup *hw)
  68 {
  69     qemu_free(hw->data);
  70     qemu_free(hw);
  71 }
  72
  73 static inline void hwsetup_create_rom(HWSetup *hw,
  74         target_phys_addr_t base)
  75 {
  76     rom_add_blob("hwsetup", hw->data, TARGET_PAGE_SIZE, base);
  77 }
  78
  79 static inline void hwsetup_add_u8(HWSetup *hw, uint8_t u)
  80 {
  81     stb_p(hw->ptr, u);
  82     hw->ptr += 1;
  83 }
  84
  85 static inline void hwsetup_add_u32(HWSetup *hw, uint32_t u)
  86 {
  87     stl_p(hw->ptr, u);
  88     hw->ptr += 4;
  89 }
  90
  91 static inline void hwsetup_add_tag(HWSetup *hw, enum hwsetup_tag t)
  92 {
  93     stl_p(hw->ptr, t);
  94     hw->ptr += 4;
  95 }
  96
  97 static inline void hwsetup_add_str(HWSetup *hw, const char *str)
  98 {
  99     strncpy(hw->ptr, str, 31); /* make sure last byte is zero */
 100     hw->ptr += 32;
 101 }
 102
 103 static inline void hwsetup_add_trailer(HWSetup *hw)
 104 {
 105     hwsetup_add_u32(hw, 8); /* size */
 106     hwsetup_add_tag(hw, HWSETUP_TAG_EOL);
 107 }
 108
 109 static inline void hwsetup_add_cpu(HWSetup *hw,
 110         const char *name, uint32_t frequency)
 111 {
 112     hwsetup_add_u32(hw, 44); /* size */
 113     hwsetup_add_tag(hw, HWSETUP_TAG_CPU);
 114     hwsetup_add_str(hw, name);
 115     hwsetup_add_u32(hw, frequency);
 116 }
 117
 118 static inline void hwsetup_add_flash(HWSetup *hw,
 119         const char *name, uint32_t base, uint32_t size)
 120 {
 121     hwsetup_add_u32(hw, 52); /* size */
 122     hwsetup_add_tag(hw, HWSETUP_TAG_FLASH);
 123     hwsetup_add_str(hw, name);
 124     hwsetup_add_u32(hw, base);
 125     hwsetup_add_u32(hw, size);
 126     hwsetup_add_u8(hw, 8); /* read latency */
 127     hwsetup_add_u8(hw, 8); /* write latency */
 128     hwsetup_add_u8(hw, 25); /* address width */
 129     hwsetup_add_u8(hw, 32); /* data width */
 130 }
 131
 132 static inline void hwsetup_add_ddr_sdram(HWSetup *hw,
 133         const char *name, uint32_t base, uint32_t size)
 134 {
 135     hwsetup_add_u32(hw, 48); /* size */
 136     hwsetup_add_tag(hw, HWSETUP_TAG_DDR_SDRAM);
 137     hwsetup_add_str(hw, name);
 138     hwsetup_add_u32(hw, base);
 139     hwsetup_add_u32(hw, size);
 140 }
 141
 142 static inline void hwsetup_add_timer(HWSetup *hw,
 143         const char *name, uint32_t base, uint32_t irq)
 144 {
 145     hwsetup_add_u32(hw, 56); /* size */
 146     hwsetup_add_tag(hw, HWSETUP_TAG_TIMER);
 147     hwsetup_add_str(hw, name);
 148     hwsetup_add_u32(hw, base);
 149     hwsetup_add_u8(hw, 1); /* wr_tickcount */
 150     hwsetup_add_u8(hw, 1); /* rd_tickcount */
 151     hwsetup_add_u8(hw, 1); /* start_stop_control */
 152     hwsetup_add_u8(hw, 32); /* counter_width */
 153     hwsetup_add_u32(hw, 20); /* reload_ticks */
 154     hwsetup_add_u8(hw, irq);
 155     hwsetup_add_u8(hw, 0); /* padding */
 156     hwsetup_add_u8(hw, 0); /* padding */
 157     hwsetup_add_u8(hw, 0); /* padding */
 158 }
 159
 160 static inline void hwsetup_add_uart(HWSetup *hw,
 161         const char *name, uint32_t base, uint32_t irq)
 162 {
 163     hwsetup_add_u32(hw, 56); /* size */
 164     hwsetup_add_tag(hw, HWSETUP_TAG_UART);
 165     hwsetup_add_str(hw, name);
 166     hwsetup_add_u32(hw, base);
 167     hwsetup_add_u32(hw, 115200); /* baudrate */
 168     hwsetup_add_u8(hw, 8); /* databits */
 169     hwsetup_add_u8(hw, 1); /* stopbits */
 170     hwsetup_add_u8(hw, 1); /* use_interrupt */
 171     hwsetup_add_u8(hw, 1); /* block_on_transmit */
 172     hwsetup_add_u8(hw, 1); /* block_on_receive */
 173     hwsetup_add_u8(hw, 4); /* rx_buffer_size */
 174     hwsetup_add_u8(hw, 4); /* tx_buffer_size */
 175     hwsetup_add_u8(hw, irq);
 176 }
 177
 178 #endif /* QEMU_HW_LM32_HWSETUP_H */