74 lines
2.2 KiB
PHP
74 lines
2.2 KiB
PHP
// set 64Drive interface constants.
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// NOTE: although STATUSes are marked as halfwords,
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// you should use lw/sw to interact with them.
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constant CI_BASE($B800)
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constant CI_BASE_EXTENDED($BF80)
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constant CI_GENERAL_BUFFER($0000) // 512 bytes
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constant CI_STATUS($0200) // halfword
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constant CI_COMMAND($0208) // word
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constant CI_LBA($0210) // word
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constant CI_LENGTH($0218) // word
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constant CI_RESULT($0220) // word
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constant CI_SDRAM_SIZE($02E8) // word
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constant CI_HW_MAGIC($02EC) // word ("UDEV")
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constant CI_HW_VARIANT($02F0) // word
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constant CI_PERSISTENT($02F4) // word (RESERVED)
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constant CI_BUTTON_STATUS($02F8) // halfword (needs debouncing)
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constant CI_UPGRADE_MOD_STATUS($02FA) // halfword
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constant CI_REVISION_NUMBER($02FC) // halfword
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constant CI_USB_COMMAND_STATUS($0400) // byte
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constant CI_USB_PARAM_RESULT_0($0404) // word
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constant CI_USB_PARAM_RESULT_1($0408) // word
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constant CI_WIFI_COMMAND_STATUS($0420) // byte
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constant CI_WIFI_PARAM_RESULT_0($0424) // word
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constant CI_WIFI_PARAM_RESULT_1($0428) // word
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constant CI_EEPROM($1000) // 2048 bytes
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constant CI_WRITEBACK_LBA($1800) // 1024 bytes (256 words)
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macro CI_WAIT() {
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// requires t9 to be set to either CI_BASE or CI_BASE_EXTENDED
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PI_WAIT()
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-
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lw t0, CI_STATUS(t9)
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srl t0, t0, 12 // first 12 bits are reserved, so ignore them
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bnez t0,-
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nop
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}
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macro CI_USB_WRITE_WAIT(timeout) {
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// requires t9 to be set to either CI_BASE or CI_BASE_EXTENDED
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PI_WAIT()
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if {timeout} > 0 {
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li v0, {timeout}
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-
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lw t0, CI_USB_COMMAND_STATUS(t9)
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beqz v0,+ // die
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srl t0, t0, 4 // shift out ARM status, leaving WRITE status
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bnez t0,-
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subiu v0, v0, 1
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b ++ // exit normally
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or v0, r0, r0
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+
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li t0, 0xF
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sw t0, CI_USB_COMMAND_STATUS(t9) // force disarm
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lli v0, 0xDEAD // return error code
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+
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} else {
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-
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lw t0, CI_USB_COMMAND_STATUS(t9)
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srl t0, t0, 4 // shift out ARM status, leaving WRITE status
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bnez t0,-
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nop
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}
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}
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