sound/soc/sof/xtensa/core.c

Source file repositories/reference/linux-study-clean/sound/soc/sof/xtensa/core.c

File Facts

System
Linux kernel
Corpus path
sound/soc/sof/xtensa/core.c
Extension
.c
Size
5823 bytes
Lines
156
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct xtensa_exception_cause {
	u32 id;
	const char *msg;
	const char *description;
};

/*
 * From 4.4.1.5 table 4-64 Exception Causes of Xtensa
 * Instruction Set Architecture (ISA) Reference Manual
 */
static const struct xtensa_exception_cause xtensa_exception_causes[] = {
	{0, "IllegalInstructionCause", "Illegal instruction"},
	{1, "SyscallCause", "SYSCALL instruction"},
	{2, "InstructionFetchErrorCause",
	"Processor internal physical address or data error during instruction fetch"},
	{3, "LoadStoreErrorCause",
	"Processor internal physical address or data error during load or store"},
	{4, "Level1InterruptCause",
	"Level-1 interrupt as indicated by set level-1 bits in the INTERRUPT register"},
	{5, "AllocaCause",
	"MOVSP instruction, if caller’s registers are not in the register file"},
	{6, "IntegerDivideByZeroCause",
	"QUOS, QUOU, REMS, or REMU divisor operand is zero"},
	{8, "PrivilegedCause",
	"Attempt to execute a privileged operation when CRING ? 0"},
	{9, "LoadStoreAlignmentCause", "Load or store to an unaligned address"},
	{12, "InstrPIFDataErrorCause",
	"PIF data error during instruction fetch"},
	{13, "LoadStorePIFDataErrorCause",
	"Synchronous PIF data error during LoadStore access"},
	{14, "InstrPIFAddrErrorCause",
	"PIF address error during instruction fetch"},
	{15, "LoadStorePIFAddrErrorCause",
	"Synchronous PIF address error during LoadStore access"},
	{16, "InstTLBMissCause", "Error during Instruction TLB refill"},
	{17, "InstTLBMultiHitCause",
	"Multiple instruction TLB entries matched"},
	{18, "InstFetchPrivilegeCause",
	"An instruction fetch referenced a virtual address at a ring level less than CRING"},
	{20, "InstFetchProhibitedCause",
	"An instruction fetch referenced a page mapped with an attribute that does not permit instruction fetch"},
	{24, "LoadStoreTLBMissCause",
	"Error during TLB refill for a load or store"},
	{25, "LoadStoreTLBMultiHitCause",
	"Multiple TLB entries matched for a load or store"},
	{26, "LoadStorePrivilegeCause",
	"A load or store referenced a virtual address at a ring level less than CRING"},
	{28, "LoadProhibitedCause",
	"A load referenced a page mapped with an attribute that does not permit loads"},
	{32, "Coprocessor0Disabled",
	"Coprocessor 0 instruction when cp0 disabled"},
	{33, "Coprocessor1Disabled",
	"Coprocessor 1 instruction when cp1 disabled"},
	{34, "Coprocessor2Disabled",
	"Coprocessor 2 instruction when cp2 disabled"},
	{35, "Coprocessor3Disabled",
	"Coprocessor 3 instruction when cp3 disabled"},
	{36, "Coprocessor4Disabled",
	"Coprocessor 4 instruction when cp4 disabled"},
	{37, "Coprocessor5Disabled",
	"Coprocessor 5 instruction when cp5 disabled"},
	{38, "Coprocessor6Disabled",
	"Coprocessor 6 instruction when cp6 disabled"},
	{39, "Coprocessor7Disabled",
	"Coprocessor 7 instruction when cp7 disabled"},
};

/* only need xtensa atm */
static void xtensa_dsp_oops(struct snd_sof_dev *sdev, const char *level, void *oops)
{
	struct sof_ipc_dsp_oops_xtensa *xoops = oops;
	int i;

	dev_printk(level, sdev->dev, "error: DSP Firmware Oops\n");
	for (i = 0; i < ARRAY_SIZE(xtensa_exception_causes); i++) {
		if (xtensa_exception_causes[i].id == xoops->exccause) {
			dev_printk(level, sdev->dev,
				   "error: Exception Cause: %s, %s\n",
				   xtensa_exception_causes[i].msg,
				   xtensa_exception_causes[i].description);
		}
	}
	dev_printk(level, sdev->dev,
		   "EXCCAUSE 0x%8.8x EXCVADDR 0x%8.8x PS       0x%8.8x SAR     0x%8.8x\n",
		   xoops->exccause, xoops->excvaddr, xoops->ps, xoops->sar);
	dev_printk(level, sdev->dev,
		   "EPC1     0x%8.8x EPC2     0x%8.8x EPC3     0x%8.8x EPC4    0x%8.8x",
		   xoops->epc1, xoops->epc2, xoops->epc3, xoops->epc4);
	dev_printk(level, sdev->dev,
		   "EPC5     0x%8.8x EPC6     0x%8.8x EPC7     0x%8.8x DEPC    0x%8.8x",

Annotation

Implementation Notes