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Annotation of qemu/roms/openbios/drivers/fw_cfg.c, revision 1.1

1.1     ! root        1: #include "config.h"
        !             2: #include "libopenbios/bindings.h"
        !             3: #include "libc/byteorder.h"
        !             4: #include "libopenbios/ofmem.h"
        !             5: #define NO_QEMU_PROTOS
        !             6: #include "arch/common/fw_cfg.h"
        !             7: 
        !             8: #if !defined(CONFIG_SPARC64)
        !             9: static volatile uint16_t *fw_cfg_cmd;
        !            10: static volatile uint8_t *fw_cfg_data;
        !            11: 
        !            12: void
        !            13: fw_cfg_read(uint16_t cmd, char *buf, unsigned int nbytes)
        !            14: {
        !            15:     unsigned int i;
        !            16: 
        !            17:     *fw_cfg_cmd = cmd;
        !            18:     for (i = 0; i < nbytes; i++)
        !            19:         buf[i] = *fw_cfg_data;
        !            20: }
        !            21: #else
        !            22: // XXX depends on PCI bus location, should be removed
        !            23: void
        !            24: fw_cfg_read(uint16_t cmd, char *buf, unsigned int nbytes)
        !            25: {
        !            26:     unsigned int i;
        !            27: 
        !            28:     outw(cmd, CONFIG_FW_CFG_ADDR);
        !            29:     for (i = 0; i < nbytes; i++)
        !            30:         buf[i] = inb(CONFIG_FW_CFG_ADDR + 1);
        !            31: }
        !            32: #endif
        !            33: 
        !            34: uint64_t
        !            35: fw_cfg_read_i64(uint16_t cmd)
        !            36: {
        !            37:     uint64_t buf;
        !            38: 
        !            39:     fw_cfg_read(cmd, (char *)&buf, sizeof(uint64_t));
        !            40: 
        !            41:     return __le64_to_cpu(buf);
        !            42: }
        !            43: 
        !            44: uint32_t
        !            45: fw_cfg_read_i32(uint16_t cmd)
        !            46: {
        !            47:     uint32_t buf;
        !            48: 
        !            49:     fw_cfg_read(cmd, (char *)&buf, sizeof(uint32_t));
        !            50: 
        !            51:     return __le32_to_cpu(buf);
        !            52: }
        !            53: 
        !            54: uint16_t
        !            55: fw_cfg_read_i16(uint16_t cmd)
        !            56: {
        !            57:     uint16_t buf;
        !            58: 
        !            59:     fw_cfg_read(cmd, (char *)&buf, sizeof(uint16_t));
        !            60: 
        !            61:     return __le16_to_cpu(buf);
        !            62: }
        !            63: 
        !            64: void
        !            65: fw_cfg_init(void)
        !            66: {
        !            67: #if defined(CONFIG_SPARC32)
        !            68:     fw_cfg_cmd = (void *)ofmem_map_io(CONFIG_FW_CFG_ADDR, 2);
        !            69:     fw_cfg_data = (uint8_t *)fw_cfg_cmd + 2;
        !            70: #elif defined(CONFIG_SPARC64)
        !            71:     // Nothing for the port version
        !            72: #elif defined(CONFIG_PPC)
        !            73:     fw_cfg_cmd = (void *)CONFIG_FW_CFG_ADDR;
        !            74:     fw_cfg_data = (void *)(CONFIG_FW_CFG_ADDR + 2);
        !            75: #endif
        !            76: }

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