efHeterogeneousSynchronization currentMemoryDefinition.c 李欣儒 commit at 2020-12-11

efHeterogeneousSynchronization/dataSharedMemory/currentMemoryDefinition.c

@@ -155,3 +155,90 @@ pal_init(void)
 	tbia(); /* do it directly in case we are SMP */
 }
 
+/*
+ * Start the kernel.
+ */
+static inline void
+runkernel(void)
+{
+	__asm__ __volatile__(
+		"bis %0,%0,$27\n\t"
+		"jmp ($27)"
+		: /* no outputs: it doesn't even return */
+		: "r" (START_ADDR));
+}
+
+/* Must record the SP (it is virtual) on entry, so we can make sure
+   not to overwrite it during movement or decompression. */
+unsigned long SP_on_entry;
+
+/* Calculate the kernel image address based on the end of the BOOTP
+   bootstrapper (ie this program).
+*/
+extern char _end;
+#define KERNEL_ORIGIN \
+	((((unsigned long)&_end) + 511) & ~511)
+
+/* Round address to next higher page boundary. */
+#define NEXT_PAGE(a)	(((a) | (PAGE_SIZE - 1)) + 1)
+
+#ifdef INITRD_IMAGE_SIZE
+# define REAL_INITRD_SIZE INITRD_IMAGE_SIZE
+#else
+# define REAL_INITRD_SIZE 0
+#endif
+
+/* Defines from include/asm-alpha/system.h
+
+	BOOT_ADDR	Virtual address at which the consoles loads
+			the BOOTP image.
+
+	KERNEL_START    KSEG address at which the kernel is built to run,
+			which includes some initial data pages before the
+			code.
+
+	START_ADDR	KSEG address of the entry point of kernel code.
+
+	ZERO_PGE	KSEG address of page full of zeroes, but 
+			upon entry to kerne cvan be expected
+			to hold the parameter list and possible
+			INTRD information.
+
+   These are used in the local defines below.
+*/
+  
+
+/* Virtual addresses for the BOOTP image. Note that this includes the
+   bootstrapper code as well as the compressed kernel image, and
+   possibly the INITRD image.
+
+   Oh, and do NOT forget the STACK, which appears to be placed virtually
+   beyond the end of the loaded image.
+*/
+#define V_BOOT_IMAGE_START	BOOT_ADDR
+#define V_BOOT_IMAGE_END	SP_on_entry
+
+/* Virtual addresses for just the bootstrapper part of the BOOTP image. */
+#define V_BOOTSTRAPPER_START	BOOT_ADDR
+#define V_BOOTSTRAPPER_END	KERNEL_ORIGIN
+
+/* Virtual addresses for just the data part of the BOOTP
+   image. This may also include the INITRD image, but always
+   includes the STACK.
+*/
+#define V_DATA_START		KERNEL_ORIGIN
+#define V_INITRD_START		(KERNEL_ORIGIN + KERNEL_Z_SIZE)
+#define V_INTRD_END		(V_INITRD_START + REAL_INITRD_SIZE)
+#define V_DATA_END	 	V_BOOT_IMAGE_END
+
+/* KSEG addresses for the uncompressed kernel.
+
+   Note that the end address includes workspace for the decompression.
+   Note also that the DATA_START address is ZERO_PGE, to which we write
+   just before jumping to the kernel image at START_ADDR.
+ */
+#define K_KERNEL_DATA_START	ZERO_PGE
+#define K_KERNEL_IMAGE_START	START_ADDR
+#define K_KERNEL_IMAGE_END	(START_ADDR + KERNEL_SIZE)
+
+/* Define to where we may have to decompress the kernel image, before