Archipelago » qemu

/*

 * QEMU SM501 Device

 *

 * Copyright (c) 2008 Shin-ichiro KAWASAKI

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#include <stdio.h>

#include "hw.h"

#include "pc.h"

#include "console.h"

#include "devices.h"

/*

 * Status: 2008/11/02

 *   - Minimum implementation for Linux console : mmio regs and CRT layer.

 *   - Always updates full screen.

 *

 * TODO:

 *   - Panel support

 *   - Hardware cursor support

 *   - Touch panel support

 *   - USB support

 *   - UART support

 *   - Performance tuning

 */

//#define DEBUG_SM501

//#define DEBUG_BITBLT

#ifdef DEBUG_SM501

#define SM501_DPRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__)

#else

#define SM501_DPRINTF(fmt, ...) do {} while(0)

#endif

#define MMIO_BASE_OFFSET 0x3e00000

/* SM501 register definitions taken from "linux/include/linux/sm501-regs.h" */

/* System Configuration area */

/* System config base */

#define SM501_SYS_CONFIG                (0x000000)

/* config 1 */

#define SM501_SYSTEM_CONTROL                 (0x000000)

#define SM501_SYSCTRL_PANEL_TRISTATE        (1<<0)

#define SM501_SYSCTRL_MEM_TRISTATE        (1<<1)

#define SM501_SYSCTRL_CRT_TRISTATE        (1<<2)

#define SM501_SYSCTRL_PCI_SLAVE_BURST_MASK (3<<4)

#define SM501_SYSCTRL_PCI_SLAVE_BURST_1        (0<<4)

#define SM501_SYSCTRL_PCI_SLAVE_BURST_2        (1<<4)

#define SM501_SYSCTRL_PCI_SLAVE_BURST_4        (2<<4)

#define SM501_SYSCTRL_PCI_SLAVE_BURST_8        (3<<4)

#define SM501_SYSCTRL_PCI_CLOCK_RUN_EN        (1<<6)

#define SM501_SYSCTRL_PCI_RETRY_DISABLE        (1<<7)

#define SM501_SYSCTRL_PCI_SUBSYS_LOCK        (1<<11)

#define SM501_SYSCTRL_PCI_BURST_READ_EN        (1<<15)

/* miscellaneous control */

#define SM501_MISC_CONTROL                (0x000004)

#define SM501_MISC_BUS_SH                (0x0)

#define SM501_MISC_BUS_PCI                (0x1)

#define SM501_MISC_BUS_XSCALE                (0x2)

#define SM501_MISC_BUS_NEC                (0x6)

#define SM501_MISC_BUS_MASK                (0x7)

#define SM501_MISC_VR_62MB                (1<<3)

#define SM501_MISC_CDR_RESET                (1<<7)

#define SM501_MISC_USB_LB                (1<<8)

#define SM501_MISC_USB_SLAVE                (1<<9)

#define SM501_MISC_BL_1                        (1<<10)

#define SM501_MISC_MC                        (1<<11)

#define SM501_MISC_DAC_POWER                (1<<12)

#define SM501_MISC_IRQ_INVERT                (1<<16)

#define SM501_MISC_SH                        (1<<17)

#define SM501_MISC_HOLD_EMPTY                (0<<18)

#define SM501_MISC_HOLD_8                (1<<18)

#define SM501_MISC_HOLD_16                (2<<18)

#define SM501_MISC_HOLD_24                (3<<18)

#define SM501_MISC_HOLD_32                (4<<18)

#define SM501_MISC_HOLD_MASK                (7<<18)

#define SM501_MISC_FREQ_12                (1<<24)

#define SM501_MISC_PNL_24BIT                (1<<25)

#define SM501_MISC_8051_LE                (1<<26)

#define SM501_GPIO31_0_CONTROL                (0x000008)

#define SM501_GPIO63_32_CONTROL                (0x00000C)

#define SM501_DRAM_CONTROL                (0x000010)

/* command list */

#define SM501_ARBTRTN_CONTROL                (0x000014)

/* command list */

#define SM501_COMMAND_LIST_STATUS        (0x000024)

/* interrupt debug */

#define SM501_RAW_IRQ_STATUS                (0x000028)

#define SM501_RAW_IRQ_CLEAR                (0x000028)

#define SM501_IRQ_STATUS                (0x00002C)

#define SM501_IRQ_MASK                        (0x000030)

#define SM501_DEBUG_CONTROL                (0x000034)

/* power management */

#define SM501_POWERMODE_P2X_SRC                (1<<29)

#define SM501_POWERMODE_V2X_SRC                (1<<20)

#define SM501_POWERMODE_M_SRC                (1<<12)

#define SM501_POWERMODE_M1_SRC                (1<<4)

#define SM501_CURRENT_GATE                (0x000038)

#define SM501_CURRENT_CLOCK                (0x00003C)

#define SM501_POWER_MODE_0_GATE                (0x000040)

#define SM501_POWER_MODE_0_CLOCK        (0x000044)

#define SM501_POWER_MODE_1_GATE                (0x000048)

#define SM501_POWER_MODE_1_CLOCK        (0x00004C)

#define SM501_SLEEP_MODE_GATE                (0x000050)

#define SM501_POWER_MODE_CONTROL        (0x000054)

/* power gates for units within the 501 */

#define SM501_GATE_HOST                        (0)

#define SM501_GATE_MEMORY                (1)

#define SM501_GATE_DISPLAY                (2)

#define SM501_GATE_2D_ENGINE                (3)

#define SM501_GATE_CSC                        (4)

#define SM501_GATE_ZVPORT                (5)

#define SM501_GATE_GPIO                        (6)

#define SM501_GATE_UART0                (7)

#define SM501_GATE_UART1                (8)

#define SM501_GATE_SSP                        (10)

#define SM501_GATE_USB_HOST                (11)

#define SM501_GATE_USB_GADGET                (12)

#define SM501_GATE_UCONTROLLER                (17)

#define SM501_GATE_AC97                        (18)

/* panel clock */

#define SM501_CLOCK_P2XCLK                (24)

/* crt clock */

#define SM501_CLOCK_V2XCLK                (16)

/* main clock */

#define SM501_CLOCK_MCLK                (8)

/* SDRAM controller clock */

#define SM501_CLOCK_M1XCLK                (0)

/* config 2 */

#define SM501_PCI_MASTER_BASE                (0x000058)

#define SM501_ENDIAN_CONTROL                (0x00005C)

#define SM501_DEVICEID                        (0x000060)

/* 0x050100A0 */

#define SM501_DEVICEID_SM501                (0x05010000)

#define SM501_DEVICEID_IDMASK                (0xffff0000)

#define SM501_DEVICEID_REVMASK                (0x000000ff)

#define SM501_PLLCLOCK_COUNT                (0x000064)

#define SM501_MISC_TIMING                (0x000068)

#define SM501_CURRENT_SDRAM_CLOCK        (0x00006C)

#define SM501_PROGRAMMABLE_PLL_CONTROL        (0x000074)

/* GPIO base */

#define SM501_GPIO                        (0x010000)

#define SM501_GPIO_DATA_LOW                (0x00)

#define SM501_GPIO_DATA_HIGH                (0x04)

#define SM501_GPIO_DDR_LOW                (0x08)

#define SM501_GPIO_DDR_HIGH                (0x0C)

#define SM501_GPIO_IRQ_SETUP                (0x10)

#define SM501_GPIO_IRQ_STATUS                (0x14)

#define SM501_GPIO_IRQ_RESET                (0x14)

/* I2C controller base */

#define SM501_I2C                        (0x010040)

#define SM501_I2C_BYTE_COUNT                (0x00)

#define SM501_I2C_CONTROL                (0x01)

#define SM501_I2C_STATUS                (0x02)

#define SM501_I2C_RESET                        (0x02)

#define SM501_I2C_SLAVE_ADDRESS                (0x03)

#define SM501_I2C_DATA                        (0x04)

/* SSP base */

#define SM501_SSP                        (0x020000)

/* Uart 0 base */

#define SM501_UART0                        (0x030000)

/* Uart 1 base */

#define SM501_UART1                        (0x030020)

/* USB host port base */

#define SM501_USB_HOST                        (0x040000)

/* USB slave/gadget base */

#define SM501_USB_GADGET                (0x060000)

/* USB slave/gadget data port base */

#define SM501_USB_GADGET_DATA                (0x070000)

/* Display controller/video engine base */

#define SM501_DC                        (0x080000)

/* common defines for the SM501 address registers */

#define SM501_ADDR_FLIP                        (1<<31)

#define SM501_ADDR_EXT                        (1<<27)

#define SM501_ADDR_CS1                        (1<<26)

#define SM501_ADDR_MASK                        (0x3f << 26)

#define SM501_FIFO_MASK                        (0x3 << 16)

#define SM501_FIFO_1                        (0x0 << 16)

#define SM501_FIFO_3                        (0x1 << 16)

#define SM501_FIFO_7                        (0x2 << 16)

#define SM501_FIFO_11                        (0x3 << 16)

/* common registers for panel and the crt */

#define SM501_OFF_DC_H_TOT                (0x000)

#define SM501_OFF_DC_V_TOT                (0x008)

#define SM501_OFF_DC_H_SYNC                (0x004)

#define SM501_OFF_DC_V_SYNC                (0x00C)

#define SM501_DC_PANEL_CONTROL                (0x000)

#define SM501_DC_PANEL_CONTROL_FPEN        (1<<27)

#define SM501_DC_PANEL_CONTROL_BIAS        (1<<26)

#define SM501_DC_PANEL_CONTROL_DATA        (1<<25)

#define SM501_DC_PANEL_CONTROL_VDD        (1<<24)

#define SM501_DC_PANEL_CONTROL_DP        (1<<23)

#define SM501_DC_PANEL_CONTROL_TFT_888        (0<<21)

#define SM501_DC_PANEL_CONTROL_TFT_333        (1<<21)

#define SM501_DC_PANEL_CONTROL_TFT_444        (2<<21)

#define SM501_DC_PANEL_CONTROL_DE        (1<<20)

#define SM501_DC_PANEL_CONTROL_LCD_TFT        (0<<18)

#define SM501_DC_PANEL_CONTROL_LCD_STN8        (1<<18)

#define SM501_DC_PANEL_CONTROL_LCD_STN12 (2<<18)

#define SM501_DC_PANEL_CONTROL_CP        (1<<14)

#define SM501_DC_PANEL_CONTROL_VSP        (1<<13)

#define SM501_DC_PANEL_CONTROL_HSP        (1<<12)

#define SM501_DC_PANEL_CONTROL_CK        (1<<9)

#define SM501_DC_PANEL_CONTROL_TE        (1<<8)

#define SM501_DC_PANEL_CONTROL_VPD        (1<<7)

#define SM501_DC_PANEL_CONTROL_VP        (1<<6)

#define SM501_DC_PANEL_CONTROL_HPD        (1<<5)

#define SM501_DC_PANEL_CONTROL_HP        (1<<4)

#define SM501_DC_PANEL_CONTROL_GAMMA        (1<<3)

#define SM501_DC_PANEL_CONTROL_EN        (1<<2)

#define SM501_DC_PANEL_CONTROL_8BPP        (0<<0)

#define SM501_DC_PANEL_CONTROL_16BPP        (1<<0)

#define SM501_DC_PANEL_CONTROL_32BPP        (2<<0)

#define SM501_DC_PANEL_PANNING_CONTROL        (0x004)

#define SM501_DC_PANEL_COLOR_KEY        (0x008)

#define SM501_DC_PANEL_FB_ADDR                (0x00C)

#define SM501_DC_PANEL_FB_OFFSET        (0x010)

#define SM501_DC_PANEL_FB_WIDTH                (0x014)

#define SM501_DC_PANEL_FB_HEIGHT        (0x018)

#define SM501_DC_PANEL_TL_LOC                (0x01C)

#define SM501_DC_PANEL_BR_LOC                (0x020)

#define SM501_DC_PANEL_H_TOT                (0x024)

#define SM501_DC_PANEL_H_SYNC                (0x028)

#define SM501_DC_PANEL_V_TOT                (0x02C)

#define SM501_DC_PANEL_V_SYNC                (0x030)

#define SM501_DC_PANEL_CUR_LINE                (0x034)

#define SM501_DC_VIDEO_CONTROL                (0x040)

#define SM501_DC_VIDEO_FB0_ADDR                (0x044)

#define SM501_DC_VIDEO_FB_WIDTH                (0x048)

#define SM501_DC_VIDEO_FB0_LAST_ADDR        (0x04C)

#define SM501_DC_VIDEO_TL_LOC                (0x050)

#define SM501_DC_VIDEO_BR_LOC                (0x054)

#define SM501_DC_VIDEO_SCALE                (0x058)

#define SM501_DC_VIDEO_INIT_SCALE        (0x05C)

#define SM501_DC_VIDEO_YUV_CONSTANTS        (0x060)

#define SM501_DC_VIDEO_FB1_ADDR                (0x064)

#define SM501_DC_VIDEO_FB1_LAST_ADDR        (0x068)

#define SM501_DC_VIDEO_ALPHA_CONTROL        (0x080)

#define SM501_DC_VIDEO_ALPHA_FB_ADDR        (0x084)

#define SM501_DC_VIDEO_ALPHA_FB_OFFSET        (0x088)

#define SM501_DC_VIDEO_ALPHA_FB_LAST_ADDR        (0x08C)

#define SM501_DC_VIDEO_ALPHA_TL_LOC        (0x090)

#define SM501_DC_VIDEO_ALPHA_BR_LOC        (0x094)

#define SM501_DC_VIDEO_ALPHA_SCALE        (0x098)

#define SM501_DC_VIDEO_ALPHA_INIT_SCALE        (0x09C)

#define SM501_DC_VIDEO_ALPHA_CHROMA_KEY        (0x0A0)

#define SM501_DC_VIDEO_ALPHA_COLOR_LOOKUP        (0x0A4)

#define SM501_DC_PANEL_HWC_BASE                (0x0F0)

#define SM501_DC_PANEL_HWC_ADDR                (0x0F0)

#define SM501_DC_PANEL_HWC_LOC                (0x0F4)

#define SM501_DC_PANEL_HWC_COLOR_1_2        (0x0F8)

#define SM501_DC_PANEL_HWC_COLOR_3        (0x0FC)

#define SM501_HWC_EN                        (1<<31)

#define SM501_OFF_HWC_ADDR                (0x00)

#define SM501_OFF_HWC_LOC                (0x04)

#define SM501_OFF_HWC_COLOR_1_2                (0x08)

#define SM501_OFF_HWC_COLOR_3                (0x0C)

#define SM501_DC_ALPHA_CONTROL                (0x100)

#define SM501_DC_ALPHA_FB_ADDR                (0x104)

#define SM501_DC_ALPHA_FB_OFFSET        (0x108)

#define SM501_DC_ALPHA_TL_LOC                (0x10C)

#define SM501_DC_ALPHA_BR_LOC                (0x110)

#define SM501_DC_ALPHA_CHROMA_KEY        (0x114)

#define SM501_DC_ALPHA_COLOR_LOOKUP        (0x118)

#define SM501_DC_CRT_CONTROL                (0x200)

#define SM501_DC_CRT_CONTROL_TVP        (1<<15)

#define SM501_DC_CRT_CONTROL_CP                (1<<14)

#define SM501_DC_CRT_CONTROL_VSP        (1<<13)

#define SM501_DC_CRT_CONTROL_HSP        (1<<12)

#define SM501_DC_CRT_CONTROL_VS                (1<<11)

#define SM501_DC_CRT_CONTROL_BLANK        (1<<10)

#define SM501_DC_CRT_CONTROL_SEL        (1<<9)

#define SM501_DC_CRT_CONTROL_TE                (1<<8)

#define SM501_DC_CRT_CONTROL_PIXEL_MASK (0xF << 4)

#define SM501_DC_CRT_CONTROL_GAMMA        (1<<3)

#define SM501_DC_CRT_CONTROL_ENABLE        (1<<2)

#define SM501_DC_CRT_CONTROL_8BPP        (0<<0)

#define SM501_DC_CRT_CONTROL_16BPP        (1<<0)

#define SM501_DC_CRT_CONTROL_32BPP        (2<<0)

#define SM501_DC_CRT_FB_ADDR                (0x204)

#define SM501_DC_CRT_FB_OFFSET                (0x208)

#define SM501_DC_CRT_H_TOT                (0x20C)

#define SM501_DC_CRT_H_SYNC                (0x210)

#define SM501_DC_CRT_V_TOT                (0x214)

#define SM501_DC_CRT_V_SYNC                (0x218)

#define SM501_DC_CRT_SIGNATURE_ANALYZER        (0x21C)

#define SM501_DC_CRT_CUR_LINE                (0x220)

#define SM501_DC_CRT_MONITOR_DETECT        (0x224)

#define SM501_DC_CRT_HWC_BASE                (0x230)

#define SM501_DC_CRT_HWC_ADDR                (0x230)

#define SM501_DC_CRT_HWC_LOC                (0x234)

#define SM501_DC_CRT_HWC_COLOR_1_2        (0x238)

#define SM501_DC_CRT_HWC_COLOR_3        (0x23C)

#define SM501_DC_PANEL_PALETTE                (0x400)

#define SM501_DC_VIDEO_PALETTE                (0x800)

#define SM501_DC_CRT_PALETTE                (0xC00)

/* Zoom Video port base */

#define SM501_ZVPORT                        (0x090000)

/* AC97/I2S base */

#define SM501_AC97                        (0x0A0000)

/* 8051 micro controller base */

#define SM501_UCONTROLLER                (0x0B0000)

/* 8051 micro controller SRAM base */

#define SM501_UCONTROLLER_SRAM                (0x0C0000)

/* DMA base */

#define SM501_DMA                        (0x0D0000)

/* 2d engine base */

#define SM501_2D_ENGINE                        (0x100000)

#define SM501_2D_SOURCE                        (0x00)

#define SM501_2D_DESTINATION                (0x04)

#define SM501_2D_DIMENSION                (0x08)

#define SM501_2D_CONTROL                (0x0C)

#define SM501_2D_PITCH                        (0x10)

#define SM501_2D_FOREGROUND                (0x14)

#define SM501_2D_BACKGROUND                (0x18)

#define SM501_2D_STRETCH                (0x1C)

#define SM501_2D_COLOR_COMPARE                (0x20)

#define SM501_2D_COLOR_COMPARE_MASK         (0x24)

#define SM501_2D_MASK                        (0x28)

#define SM501_2D_CLIP_TL                (0x2C)

#define SM501_2D_CLIP_BR                (0x30)

#define SM501_2D_MONO_PATTERN_LOW        (0x34)

#define SM501_2D_MONO_PATTERN_HIGH        (0x38)

#define SM501_2D_WINDOW_WIDTH                (0x3C)

#define SM501_2D_SOURCE_BASE                (0x40)

#define SM501_2D_DESTINATION_BASE        (0x44)

#define SM501_2D_ALPHA                        (0x48)

#define SM501_2D_WRAP                        (0x4C)

#define SM501_2D_STATUS                        (0x50)

#define SM501_CSC_Y_SOURCE_BASE                (0xC8)

#define SM501_CSC_CONSTANTS                (0xCC)

#define SM501_CSC_Y_SOURCE_X                (0xD0)

#define SM501_CSC_Y_SOURCE_Y                (0xD4)

#define SM501_CSC_U_SOURCE_BASE                (0xD8)

#define SM501_CSC_V_SOURCE_BASE                (0xDC)

#define SM501_CSC_SOURCE_DIMENSION        (0xE0)

#define SM501_CSC_SOURCE_PITCH                (0xE4)

#define SM501_CSC_DESTINATION                (0xE8)

#define SM501_CSC_DESTINATION_DIMENSION        (0xEC)

#define SM501_CSC_DESTINATION_PITCH        (0xF0)

#define SM501_CSC_SCALE_FACTOR                (0xF4)

#define SM501_CSC_DESTINATION_BASE        (0xF8)

#define SM501_CSC_CONTROL                (0xFC)

/* 2d engine data port base */

#define SM501_2D_ENGINE_DATA                (0x110000)

/* end of register definitions */

#define SM501_HWC_WIDTH                       (64)

#define SM501_HWC_HEIGHT                      (64)

/* SM501 local memory size taken from "linux/drivers/mfd/sm501.c" */

static const uint32_t sm501_mem_local_size[] = {

        [0]        = 4*1024*1024,

        [1]        = 8*1024*1024,

        [2]        = 16*1024*1024,

        [3]        = 32*1024*1024,

        [4]        = 64*1024*1024,

        [5]        = 2*1024*1024,

};

#define get_local_mem_size(s) sm501_mem_local_size[(s)->local_mem_size_index]

typedef struct SM501State {

    /* graphic console status */

    DisplayState *ds;

    /* status & internal resources */

    target_phys_addr_t base;

    uint32_t local_mem_size_index;

    uint8_t * local_mem;

    ram_addr_t local_mem_offset;

    uint32_t last_width;

    uint32_t last_height;

    /* mmio registers */

    uint32_t system_control;

    uint32_t misc_control;

    uint32_t gpio_31_0_control;

    uint32_t gpio_63_32_control;

    uint32_t dram_control;

    uint32_t irq_mask;

    uint32_t misc_timing;

    uint32_t power_mode_control;

    uint32_t uart0_ier;

    uint32_t uart0_lcr;

    uint32_t uart0_mcr;

    uint32_t uart0_scr;

    uint8_t dc_palette[0x400 * 3];

    uint32_t dc_panel_control;

    uint32_t dc_panel_panning_control;

    uint32_t dc_panel_fb_addr;

    uint32_t dc_panel_fb_offset;

    uint32_t dc_panel_fb_width;

    uint32_t dc_panel_fb_height;

    uint32_t dc_panel_tl_location;

    uint32_t dc_panel_br_location;

    uint32_t dc_panel_h_total;

    uint32_t dc_panel_h_sync;

    uint32_t dc_panel_v_total;

    uint32_t dc_panel_v_sync;

    uint32_t dc_panel_hwc_addr;

    uint32_t dc_panel_hwc_location;

    uint32_t dc_panel_hwc_color_1_2;

    uint32_t dc_panel_hwc_color_3;

    uint32_t dc_crt_control;

    uint32_t dc_crt_fb_addr;

    uint32_t dc_crt_fb_offset;

    uint32_t dc_crt_h_total;

    uint32_t dc_crt_h_sync;

    uint32_t dc_crt_v_total;

    uint32_t dc_crt_v_sync;

    uint32_t dc_crt_hwc_addr;

    uint32_t dc_crt_hwc_location;

    uint32_t dc_crt_hwc_color_1_2;

    uint32_t dc_crt_hwc_color_3;

} SM501State;

static uint32_t get_local_mem_size_index(uint32_t size)

{

    uint32_t norm_size = 0;

    int i, index = 0;

    for (i = 0; i < ARRAY_SIZE(sm501_mem_local_size); i++) {

        uint32_t new_size = sm501_mem_local_size[i];

        if (new_size >= size) {

            if (norm_size == 0 || norm_size > new_size) {

                norm_size = new_size;

                index = i;

            }

        }

    }

    return index;

}

/**

 * Check the availability of hardware cursor.

 * @param crt  0 for PANEL, 1 for CRT.

 */

static inline int is_hwc_enabled(SM501State *state, int crt)

{

    uint32_t addr = crt ? state->dc_crt_hwc_addr : state->dc_panel_hwc_addr;

    return addr & 0x80000000;

}

/**

 * Get the address which holds cursor pattern data.

 * @param crt  0 for PANEL, 1 for CRT.

 */

static inline uint32_t get_hwc_address(SM501State *state, int crt)

{

    uint32_t addr = crt ? state->dc_crt_hwc_addr : state->dc_panel_hwc_addr;

    return (addr & 0x03FFFFF0)/* >> 4*/;

}

/**

 * Get the cursor position in y coordinate.

 * @param crt  0 for PANEL, 1 for CRT.

 */

static inline uint32_t get_hwc_y(SM501State *state, int crt)

{

    uint32_t location = crt ? state->dc_crt_hwc_location

                            : state->dc_panel_hwc_location;

    return (location & 0x07FF0000) >> 16;

}

/**

 * Get the cursor position in x coordinate.

 * @param crt  0 for PANEL, 1 for CRT.

 */

static inline uint32_t get_hwc_x(SM501State *state, int crt)

{

    uint32_t location = crt ? state->dc_crt_hwc_location

                            : state->dc_panel_hwc_location;

    return location & 0x000007FF;

}

/**

 * Get the cursor position in x coordinate.

 * @param crt  0 for PANEL, 1 for CRT.

 * @param index  0, 1, 2 or 3 which specifies color of corsor dot.

 */

static inline uint16_t get_hwc_color(SM501State *state, int crt, int index)

{

    uint16_t color_reg = 0;

    uint16_t color_565 = 0;

    if (index == 0) {

        return 0;

    }

    switch (index) {

    case 1:

    case 2:

        color_reg = crt ? state->dc_crt_hwc_color_1_2

                        : state->dc_panel_hwc_color_1_2;

        break;

    case 3:

        color_reg = crt ? state->dc_crt_hwc_color_3

                        : state->dc_panel_hwc_color_3;

        break;

    default:

        printf("invalid hw cursor color.\n");

        assert(0);

    }

    switch (index) {

    case 1:

    case 3:

        color_565 = (uint16_t)(color_reg & 0xFFFF);

        break;

    case 2:

        color_565 = (uint16_t)((color_reg >> 16) & 0xFFFF);

        break;

    }

    return color_565;

}

static int within_hwc_y_range(SM501State *state, int y, int crt)

{

    int hwc_y = get_hwc_y(state, crt);

    return (hwc_y <= y && y < hwc_y + SM501_HWC_HEIGHT);

}

static uint32_t sm501_system_config_read(void *opaque, target_phys_addr_t addr)

{

    SM501State * s = (SM501State *)opaque;

    uint32_t ret = 0;

    SM501_DPRINTF("sm501 system config regs : read addr=%x\n", (int)addr);

    switch(addr) {

    case SM501_SYSTEM_CONTROL:

        ret = s->system_control;

        break;

    case SM501_MISC_CONTROL:

        ret = s->misc_control;

        break;

    case SM501_GPIO31_0_CONTROL:

        ret = s->gpio_31_0_control;

        break;

    case SM501_GPIO63_32_CONTROL:

        ret = s->gpio_63_32_control;

        break;

    case SM501_DEVICEID:

        ret = 0x050100A0;

        break;

    case SM501_DRAM_CONTROL:

        ret = (s->dram_control & 0x07F107C0) | s->local_mem_size_index << 13;

        break;

    case SM501_IRQ_MASK:

        ret = s->irq_mask;

        break;

    case SM501_MISC_TIMING:

        /* TODO : simulate gate control */

        ret = s->misc_timing;

        break;

    case SM501_CURRENT_GATE:

        /* TODO : simulate gate control */

        ret = 0x00021807;

        break;

    case SM501_CURRENT_CLOCK:

        ret = 0x2A1A0A09;

        break;

    case SM501_POWER_MODE_CONTROL:

        ret = s->power_mode_control;

        break;

    default:

        printf("sm501 system config : not implemented register read."

               " addr=%x\n", (int)addr);

        assert(0);

    }

    return ret;

}

static void sm501_system_config_write(void *opaque,

                                      target_phys_addr_t addr, uint32_t value)

{

    SM501State * s = (SM501State *)opaque;

    SM501_DPRINTF("sm501 system config regs : write addr=%x, val=%x\n",

                  addr, value);

    switch(addr) {

    case SM501_SYSTEM_CONTROL:

        s->system_control = value & 0xE300B8F7;

        break;

    case SM501_MISC_CONTROL:

        s->misc_control = value & 0xFF7FFF20;

        break;

    case SM501_GPIO31_0_CONTROL:

        s->gpio_31_0_control = value;

        break;

    case SM501_GPIO63_32_CONTROL:

        s->gpio_63_32_control = value;

        break;

    case SM501_DRAM_CONTROL:

        s->local_mem_size_index = (value >> 13) & 0x7;

        /* rODO : check validity of size change */

        s->dram_control |=  value & 0x7FFFFFC3;

        break;

    case SM501_IRQ_MASK:

        s->irq_mask = value;

        break;

    case SM501_MISC_TIMING:

        s->misc_timing = value & 0xF31F1FFF;

        break;

    case SM501_POWER_MODE_0_GATE:

    case SM501_POWER_MODE_1_GATE:

    case SM501_POWER_MODE_0_CLOCK:

    case SM501_POWER_MODE_1_CLOCK:

        /* TODO : simulate gate & clock control */

        break;

    case SM501_POWER_MODE_CONTROL:

        s->power_mode_control = value & 0x00000003;

        break;

    default:

        printf("sm501 system config : not implemented register write."

               " addr=%x, val=%x\n", (int)addr, value);

        assert(0);

    }

}

static CPUReadMemoryFunc * const sm501_system_config_readfn[] = {

    NULL,

    NULL,

    &sm501_system_config_read,

};

static CPUWriteMemoryFunc * const sm501_system_config_writefn[] = {

    NULL,

    NULL,

    &sm501_system_config_write,

};

static uint32_t sm501_palette_read(void *opaque, target_phys_addr_t addr)

{

    SM501State * s = (SM501State *)opaque;

    SM501_DPRINTF("sm501 palette read addr=%x\n", (int)addr);

    /* TODO : consider BYTE/WORD access */

    /* TODO : consider endian */

    assert(0 <= addr && addr < 0x400 * 3);

    return *(uint32_t*)&s->dc_palette[addr];

}

static void sm501_palette_write(void *opaque,

                                target_phys_addr_t addr, uint32_t value)

{

    SM501State * s = (SM501State *)opaque;

    SM501_DPRINTF("sm501 palette write addr=%x, val=%x\n",

                  (int)addr, value);

    /* TODO : consider BYTE/WORD access */

    /* TODO : consider endian */

    assert(0 <= addr && addr < 0x400 * 3);

    *(uint32_t*)&s->dc_palette[addr] = value;

}

static uint32_t sm501_disp_ctrl_read(void *opaque, target_phys_addr_t addr)

{

    SM501State * s = (SM501State *)opaque;

    uint32_t ret = 0;

    SM501_DPRINTF("sm501 disp ctrl regs : read addr=%x\n", (int)addr);

    switch(addr) {

    case SM501_DC_PANEL_CONTROL:

        ret = s->dc_panel_control;

        break;

    case SM501_DC_PANEL_PANNING_CONTROL:

        ret = s->dc_panel_panning_control;

        break;

    case SM501_DC_PANEL_FB_ADDR:

        ret = s->dc_panel_fb_addr;

        break;

    case SM501_DC_PANEL_FB_OFFSET:

        ret = s->dc_panel_fb_offset;

        break;

    case SM501_DC_PANEL_FB_WIDTH:

        ret = s->dc_panel_fb_width;

        break;

    case SM501_DC_PANEL_FB_HEIGHT:

        ret = s->dc_panel_fb_height;

        break;

    case SM501_DC_PANEL_TL_LOC:

        ret = s->dc_panel_tl_location;

        break;

    case SM501_DC_PANEL_BR_LOC:

        ret = s->dc_panel_br_location;

        break;

    case SM501_DC_PANEL_H_TOT:

        ret = s->dc_panel_h_total;

        break;

    case SM501_DC_PANEL_H_SYNC:

        ret = s->dc_panel_h_sync;

        break;

    case SM501_DC_PANEL_V_TOT:

        ret = s->dc_panel_v_total;

        break;

    case SM501_DC_PANEL_V_SYNC:

        ret = s->dc_panel_v_sync;

        break;

    case SM501_DC_CRT_CONTROL:

        ret = s->dc_crt_control;

        break;

    case SM501_DC_CRT_FB_ADDR:

        ret = s->dc_crt_fb_addr;

        break;

    case SM501_DC_CRT_FB_OFFSET:

        ret = s->dc_crt_fb_offset;

        break;

    case SM501_DC_CRT_H_TOT:

        ret = s->dc_crt_h_total;

        break;

    case SM501_DC_CRT_H_SYNC:

        ret = s->dc_crt_h_sync;

        break;

    case SM501_DC_CRT_V_TOT:

        ret = s->dc_crt_v_total;

        break;

    case SM501_DC_CRT_V_SYNC:

        ret = s->dc_crt_v_sync;

        break;

    case SM501_DC_CRT_HWC_ADDR:

        ret = s->dc_crt_hwc_addr;

        break;

    case SM501_DC_CRT_HWC_LOC:

        ret = s->dc_crt_hwc_location;

        break;

    case SM501_DC_CRT_HWC_COLOR_1_2:

        ret = s->dc_crt_hwc_color_1_2;

        break;

    case SM501_DC_CRT_HWC_COLOR_3:

        ret = s->dc_crt_hwc_color_3;

        break;

    case SM501_DC_PANEL_PALETTE ... SM501_DC_PANEL_PALETTE + 0x400*3 - 4:

        ret = sm501_palette_read(opaque, addr - SM501_DC_PANEL_PALETTE);

        break;

    default:

        printf("sm501 disp ctrl : not implemented register read."

               " addr=%x\n", (int)addr);

        assert(0);

    }

    return ret;

}

static void sm501_disp_ctrl_write(void *opaque,

                                           target_phys_addr_t addr,

                                           uint32_t value)

{