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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* 0x3F8: DEBCOM_BASE
*
* CREG: DEBCOM_REGION
* CUAR: DEBCOM_UART
* CDAT: DEBCOM_DATA
* CDLM: DEBCOM_DLM
* DLCR: DEBCOM_LCR
* CMCR: DEBCOM_MCR
* CLSR: DEBCOM_LSR
*
* DEBUG_INIT DINI
*/
OperationRegion(CREG, SystemIO, 0x3F8, 8)
Field(CREG, ByteAcc, NoLock, Preserve)
{
CDAT, 8,
CDLM, 8,, 8, DLCR, 8, CMCR, 8, CLSR, 8
}
/*
* DINI
* Initialize the COM port to 115,200 8-N-1
*/
Method(DINI)
{
store(0x83, DLCR)
store(0x01, CDAT) /* 115200 baud (low) */
store(0x00, CDLM) /* 115200 baud (high) */
store(0x03, DLCR) /* word=8 stop=1 parity=none */
store(0x03, CMCR) /* DTR=1 RTS=1 Out2=Off Loop=Off */
store(0x00, CDLM) /* turn off interrupts */
}
/*
* THRE
* Wait for COM port transmitter holding register to go empty
*/
Method(THRE)
{
and(CLSR, 0x20, local0)
while (local0 == 0) {
and(CLSR, 0x20, local0)
}
}
/*
* OUTX
* Send a single raw character
*/
Method(OUTX, 1)
{
THRE()
store(Arg0, CDAT)
}
/*
* OUTC
* Send a single character, expanding LF into CR/LF
*/
Method(OUTC, 1)
{
if (Arg0 == 0x0a) {
OUTX(0x0d)
}
OUTX(Arg0)
}
/*
* DBGN
* Send a single hex nibble
*/
Method(DBGN, 1)
{
and(Arg0, 0x0f, Local0)
if (LLess(Local0, 10)) {
add(Local0, 0x30, Local0)
} else {
add(Local0, 0x37, Local0)
}
OUTC(Local0)
}
/*
* DBGB
* Send a hex byte
*/
Method(DBGB, 1)
{
ShiftRight(Arg0, 4, Local0)
DBGN(Local0)
DBGN(Arg0)
}
/*
* DBGW
* Send a hex word
*/
Method(DBGW, 1)
{
ShiftRight(Arg0, 8, Local0)
DBGB(Local0)
DBGB(Arg0)
}
/*
* DBGD
* Send a hex Dword
*/
Method(DBGD, 1)
{
ShiftRight(Arg0, 16, Local0)
DBGW(Local0)
DBGW(Arg0)
}
/*
* DBGO
* Send either a string or an integer
*/
Method(DBGO, 1)
{
/* DINI() */
if (ObjectType(Arg0) == 1) {
if (LGreater(Arg0, 0xffff)) {
DBGD(Arg0)
} else {
if (LGreater(Arg0, 0xff)) {
DBGW(Arg0)
} else {
DBGB(Arg0)
}
}
} else {
Name(BDBG, Buffer(80) {})
store(Arg0, BDBG)
store(0, Local1)
while (One) {
store(GETC(BDBG, Local1), Local0)
if (Local0 == 0) {
return (0)
}
OUTC(Local0)
Local1++
}
}
return (0)
}
/* Get a char from a string */
Method(GETC, 2)
{
CreateByteField(Arg0, Arg1, DBGC)
return (DBGC)
}
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