git: 5d57fad876ee - main - acpidump: Print SPCR v3 and v4 fields

The branch main has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=5d57fad876ee6b55761a7643f5b94e3d6d54e3e0

commit 5d57fad876ee6b55761a7643f5b94e3d6d54e3e0
Author:     Warner Losh <imp@FreeBSD.org>
AuthorDate: 2024-10-11 17:51:57 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2024-10-11 18:06:33 +0000

    acpidump: Print SPCR v3 and v4 fields
    
    This reapplies 593d7a1634b5 to implement printing of SPCR v3 and SPCR v4
    fields after ACPI actble3.h update. ACPIca used different names and
    didn't do the weird nesting I did in the prior commit for better
    co-existance.
    
    Sponsored by: Netflix
---
 usr.sbin/acpi/acpidump/acpi.c | 143 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 142 insertions(+), 1 deletion(-)

diff --git a/usr.sbin/acpi/acpidump/acpi.c b/usr.sbin/acpi/acpidump/acpi.c
index fe68b5062351..4eb361a6f479 100644
--- a/usr.sbin/acpi/acpidump/acpi.c
+++ b/usr.sbin/acpi/acpidump/acpi.c
@@ -1257,6 +1257,7 @@ acpi_handle_tcpa(ACPI_TABLE_HEADER *sdp)
 
 	printf(END_COMMENT);
 }
+
 static void acpi_handle_tpm2(ACPI_TABLE_HEADER *sdp)
 {
 	ACPI_TABLE_TPM2 *tpm2;
@@ -1268,7 +1269,145 @@ static void acpi_handle_tpm2(ACPI_TABLE_HEADER *sdp)
 	printf ("\t\tStartMethod=%x\n", tpm2->StartMethod);	
 	printf (END_COMMENT);
 }
-	
+
+static int spcr_xlate_baud(uint8_t r)
+{
+	static int rates[] = { 9600, 19200, -1, 57600, 115200 };
+	_Static_assert(nitems(rates) == 7 - 3 + 1, "rates array size incorrect");
+
+	if (r == 0)
+		return (0);
+
+	if (r < 3 || r > 7)
+		return (-1);
+
+	return (rates[r - 3]);
+}
+
+static const char *spcr_interface_type(int ift)
+{
+	static const char *if_names[] = {
+		[0x00] = "Fully 16550-compatible",
+		[0x01] = "16550 subset compatible with DBGP Revision 1",
+		[0x02] = "MAX311xE SPI UART",
+		[0x03] = "Arm PL011 UART",
+		[0x04] = "MSM8x60 (e.g. 8960)",
+		[0x05] = "Nvidia 16550",
+		[0x06] = "TI OMAP",
+		[0x07] = "Reserved (Do Not Use)",
+		[0x08] = "APM88xxxx",
+		[0x09] = "MSM8974",
+		[0x0a] = "SAM5250",
+		[0x0b] = "Intel USIF",
+		[0x0c] = "i.MX 6",
+		[0x0d] = "(deprecated) Arm SBSA (2.x only) Generic UART supporting only 32-bit accesses",
+		[0x0e] = "Arm SBSA Generic UART",
+		[0x0f] = "Arm DCC",
+		[0x10] = "BCM2835",
+		[0x11] = "SDM845 with clock rate of 1.8432 MHz",
+		[0x12] = "16550-compatible with parameters defined in Generic Address Structure",
+		[0x13] = "SDM845 with clock rate of 7.372 MHz",
+		[0x14] = "Intel LPSS",
+		[0x15] = "RISC-V SBI console (any supported SBI mechanism)",
+	};
+
+	if (ift >= (int)nitems(if_names) || if_names[ift] == NULL)
+		return ("Reserved");
+	return (if_names[ift]);
+}
+
+static const char *spcr_interrupt_type(int ift)
+{
+	static char buf[100];
+
+#define APPEND(b,s) \
+	if ((ift & (b)) != 0) { \
+		if (strlen(buf) > 0) \
+			strlcat(buf, ",", sizeof(buf)); \
+		strlcat(buf, s, sizeof(buf)); \
+	}
+
+	*buf = '\0';
+	APPEND(0x01, "PC/AT IRQ");
+	APPEND(0x02, "I/O APIC");
+	APPEND(0x04, "I/O SAPIC");
+	APPEND(0x08, "ARMH GIC");
+	APPEND(0x10, "RISC-V PLIC/APLIC");
+
+#undef APPEND
+
+	return (buf);
+}
+
+static const char *spcr_terminal_type(int type)
+{
+	static const char *term_names[] = {
+		[0] = "VT100",
+		[1] = "Extended VT100",
+		[2] = "VT-UTF8",
+		[3] = "ANSI",
+	};
+
+	if (type >= (int)nitems(term_names) || term_names[type] == NULL)
+		return ("Reserved");
+	return (term_names[type]);
+}
+
+static void acpi_handle_spcr(ACPI_TABLE_HEADER *sdp)
+{
+	ACPI_TABLE_SPCR *spcr;
+
+	printf (BEGIN_COMMENT);
+	acpi_print_sdt(sdp);
+
+	/* Rev 1 and 2 are the same size */
+	spcr = (ACPI_TABLE_SPCR *) sdp;
+	printf ("\tInterfaceType=%d (%s)\n", spcr->InterfaceType,
+	    spcr_interface_type(spcr->InterfaceType));
+	printf ("\tSerialPort=");
+	acpi_print_gas(&spcr->SerialPort);
+	printf ("\n\tInterruptType=%#x (%s)\n", spcr->InterruptType,
+	    spcr_interrupt_type(spcr->InterruptType));
+	printf ("\tPcInterrupt=%d (%s)\n", spcr->PcInterrupt,
+	    (spcr->InterruptType & 0x1) ? "Valid" : "Invalid");
+	printf ("\tInterrupt=%d\n", spcr->Interrupt);
+	printf ("\tBaudRate=%d (%d)\n", spcr_xlate_baud(spcr->BaudRate), spcr->BaudRate);
+	printf ("\tParity=%d\n", spcr->Parity);
+	printf ("\tStopBits=%d\n", spcr->StopBits);
+	printf ("\tFlowControl=%d\n", spcr->FlowControl);
+	printf ("\tTerminalType=%d (%s)\n", spcr->TerminalType,
+	    spcr_terminal_type(spcr->TerminalType));
+	printf ("\tPciDeviceId=%#04x\n", spcr->PciDeviceId);
+	printf ("\tPciVendorId=%#04x\n", spcr->PciVendorId);
+	printf ("\tPciBus=%d\n", spcr->PciBus);
+	printf ("\tPciDevice=%d\n", spcr->PciDevice);
+	printf ("\tPciFunction=%d\n", spcr->PciFunction);
+	printf ("\tPciFlags=%d\n", spcr->PciFlags);
+	printf ("\tPciSegment=%d\n", spcr->PciSegment);
+
+	/* Rev 3 added UartClkFrequency */
+	if (sdp->Revision >= 3) {
+		printf("\tLanguage=%d\n", spcr->Language);
+		printf("\tUartClkFreq=%jd",
+		    (uintmax_t)spcr->UartClkFreq);
+	}
+
+	/* Rev 4 added PreciseBaudrate and NameSpace* */
+	if (sdp->Revision >= 4) {
+		printf("\tPreciseBaudrate=%jd",
+		    (uintmax_t)spcr->PreciseBaudrate);
+		if (spcr->NameSpaceStringLength > 0 &&
+		    spcr->NameSpaceStringOffset >= sizeof(*spcr) &&
+		    sdp->Length >= spcr->NameSpaceStringOffset +
+		        spcr->NameSpaceStringLength) {
+			printf ("\tNameSpaceString='%s'\n",
+			    (char *)sdp + spcr->NameSpaceStringOffset);
+		}
+	}
+
+	printf (END_COMMENT);
+}
+
 static const char *
 devscope_type2str(int type)
 {
@@ -2468,6 +2607,8 @@ acpi_handle_rsdt(ACPI_TABLE_HEADER *rsdp)
 			acpi_handle_lpit(sdp);
 		else if (!memcmp(sdp->Signature, ACPI_SIG_TPM2, 4))
 			acpi_handle_tpm2(sdp);
+		else if (!memcmp(sdp->Signature, ACPI_SIG_SPCR, 4))
+			acpi_handle_spcr(sdp);
 		else {
 			printf(BEGIN_COMMENT);
 			acpi_print_sdt(sdp);