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apcidump: Add dumping SPCR
When we find a SPCR (Serial Port Console Redirection) TABLE, print all the details. This includes support for the recent Revision 3 and Revision 4 tables, though I've not encountered them in the wild yet, so that code is untested. https://learn.microsoft.com/en-us/windows-hardware/drivers/serports/serial-port-console-redirection-table Sponsored by: Netflix
This commit is contained in:
Warner Losh
parent
618ae939b7
commit
593d7a1634
2 changed files with 168 additions and 3 deletions
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@ -1257,18 +1257,180 @@ acpi_handle_tcpa(ACPI_TABLE_HEADER *sdp)
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printf(END_COMMENT);
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}
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static void acpi_handle_tpm2(ACPI_TABLE_HEADER *sdp)
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{
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ACPI_TABLE_TPM2 *tpm2;
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printf (BEGIN_COMMENT);
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acpi_print_sdt(sdp);
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tpm2 = (ACPI_TABLE_TPM2 *) sdp;
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printf ("\t\tControlArea=%jx\n", tpm2->ControlAddress);
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printf ("\t\tStartMethod=%x\n", tpm2->StartMethod);
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printf ("\t\tStartMethod=%x\n", tpm2->StartMethod);
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printf (END_COMMENT);
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}
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static int spcr_xlate_baud(uint8_t r)
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{
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static int rates[] = { 9600, 19200, -1, 57600, 115200 };
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_Static_assert(nitems(rates) == 7 - 3 + 1, "rates array size incorrect");
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if (r == 0)
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return (0);
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if (r < 3 || r > 7)
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return (-1);
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return (rates[r - 3]);
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}
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static const char *spcr_interface_type(int ift)
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{
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static const char *if_names[] = {
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[0x00] = "Fully 16550-compatible",
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[0x01] = "16550 subset compatible with DBGP Revision 1",
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[0x02] = "MAX311xE SPI UART",
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[0x03] = "Arm PL011 UART",
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[0x04] = "MSM8x60 (e.g. 8960)",
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[0x05] = "Nvidia 16550",
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[0x06] = "TI OMAP",
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[0x07] = "Reserved (Do Not Use)",
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[0x08] = "APM88xxxx",
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[0x09] = "MSM8974",
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[0x0a] = "SAM5250",
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[0x0b] = "Intel USIF",
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[0x0c] = "i.MX 6",
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[0x0d] = "(deprecated) Arm SBSA (2.x only) Generic UART supporting only 32-bit accesses",
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[0x0e] = "Arm SBSA Generic UART",
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[0x0f] = "Arm DCC",
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[0x10] = "BCM2835",
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[0x11] = "SDM845 with clock rate of 1.8432 MHz",
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[0x12] = "16550-compatible with parameters defined in Generic Address Structure",
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[0x13] = "SDM845 with clock rate of 7.372 MHz",
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[0x14] = "Intel LPSS",
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[0x15] = "RISC-V SBI console (any supported SBI mechanism)",
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};
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if (ift >= (int)nitems(if_names) || if_names[ift] == NULL)
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return ("Reserved");
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return (if_names[ift]);
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}
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static const char *spcr_interrupt_type(int ift)
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{
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static char buf[100];
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#define APPEND(b,s) \
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if ((ift & (b)) != 0) { \
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if (strlen(buf) > 0) \
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strlcat(buf, ",", sizeof(buf)); \
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strlcat(buf, s, sizeof(buf)); \
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}
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*buf = '\0';
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APPEND(0x01, "PC/AT IRQ");
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APPEND(0x02, "I/O APIC");
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APPEND(0x04, "I/O SAPIC");
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APPEND(0x08, "ARMH GIC");
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APPEND(0x10, "RISC-V PLIC/APLIC");
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#undef APPEND
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return (buf);
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}
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static const char *spcr_terminal_type(int type)
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{
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static const char *term_names[] = {
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[0] = "VT100",
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[1] = "Extended VT100",
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[2] = "VT-UTF8",
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[3] = "ANSI",
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};
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if (type >= (int)nitems(term_names) || term_names[type] == NULL)
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return ("Reserved");
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return (term_names[type]);
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}
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/*
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* Serial Port Console Redirection version 3 and 4 are too new to have proper
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* definitions in ACPI headers, so provide them.
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*/
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#pragma pack(1)
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struct SPCR_3
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{
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ACPI_TABLE_SPCR spcr2;
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UINT32 UARTClockFrequency;
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};
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struct SPCR_4
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{
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struct SPCR_3 spcr3;
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UINT32 PreciseBaudRate;
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UINT16 NamespaceStringLength;
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UINT16 NamespaceStringOffset;
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};
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#pragma pack()
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static void acpi_handle_spcr(ACPI_TABLE_HEADER *sdp)
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{
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ACPI_TABLE_SPCR *spcr;
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printf (BEGIN_COMMENT);
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acpi_print_sdt(sdp);
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/* Rev 1 and 2 are the same size */
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spcr = (ACPI_TABLE_SPCR *) sdp;
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printf ("\tInterfaceType=%d (%s)\n", spcr->InterfaceType,
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spcr_interface_type(spcr->InterfaceType));
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printf ("\tSerialPort=");
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acpi_print_gas(&spcr->SerialPort);
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printf ("\n\tInterruptType=%#x (%s)\n", spcr->InterruptType,
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spcr_interrupt_type(spcr->InterruptType));
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printf ("\tPcInterrupt=%d (%s)\n", spcr->PcInterrupt,
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(spcr->InterruptType & 0x1) ? "Valid" : "Invalid");
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printf ("\tInterrupt=%d\n", spcr->Interrupt);
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printf ("\tBaudRate=%d (%d)\n", spcr_xlate_baud(spcr->BaudRate), spcr->BaudRate);
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printf ("\tParity=%d\n", spcr->Parity);
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printf ("\tStopBits=%d\n", spcr->StopBits);
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printf ("\tFlowControl=%d\n", spcr->FlowControl);
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printf ("\tTerminalType=%d (%s)\n", spcr->TerminalType,
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spcr_terminal_type(spcr->TerminalType));
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printf ("\tPciDeviceId=%#04x\n", spcr->PciDeviceId);
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printf ("\tPciVendorId=%#04x\n", spcr->PciVendorId);
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printf ("\tPciBus=%d\n", spcr->PciBus);
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printf ("\tPciDevice=%d\n", spcr->PciDevice);
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printf ("\tPciFunction=%d\n", spcr->PciFunction);
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printf ("\tPciFlags=%d\n", spcr->PciFlags);
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printf ("\tPciSegment=%d\n", spcr->PciSegment);
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/* Rev 3 added UARTClockFrequency */
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if (sdp->Revision >= 3) {
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struct SPCR_3 *spcr3 = (struct SPCR_3 *)sdp;
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printf("\tUARTClockFrequency=%jd",
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(uintmax_t)spcr3->UARTClockFrequency);
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}
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/* Rev 4 added PreciseBaudRate and Namespace* */
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if (sdp->Revision >= 4) {
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struct SPCR_4 *spcr4 = (struct SPCR_4 *)sdp;
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printf("\tPreciseBaudRate=%jd",
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(uintmax_t)spcr4->PreciseBaudRate);
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if (spcr4->NamespaceStringLength > 0 &&
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spcr4->NamespaceStringOffset >= sizeof(*spcr4) &&
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sdp->Length >= spcr4->NamespaceStringOffset +
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spcr4->NamespaceStringLength) {
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printf ("\tNamespaceString='%s'\n",
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(char *)sdp + spcr4->NamespaceStringOffset);
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}
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}
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printf (END_COMMENT);
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}
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static const char *
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devscope_type2str(int type)
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{
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@ -2468,6 +2630,8 @@ acpi_handle_rsdt(ACPI_TABLE_HEADER *rsdp)
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acpi_handle_lpit(sdp);
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else if (!memcmp(sdp->Signature, ACPI_SIG_TPM2, 4))
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acpi_handle_tpm2(sdp);
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else if (!memcmp(sdp->Signature, ACPI_SIG_SPCR, 4))
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acpi_handle_spcr(sdp);
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else {
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printf(BEGIN_COMMENT);
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acpi_print_sdt(sdp);
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@ -112,6 +112,7 @@ utility dumps contents of the following tables:
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.It RSD PTR
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.It RSDT
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.It SLIT
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.It SPCR Serial Port Console Redirection
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.It SRAT
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.It TCPA
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.It TPM2
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