Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * Startup glue code to uncompress the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *   (C) 2017 Helge Deller <deller@gmx.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <asm/asm-offsets.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/psw.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/pdc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/assembly.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "sizes.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define BOOTADDR(x)	(x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #ifndef CONFIG_64BIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	.import	$global$		/* forward declaration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #endif /*!CONFIG_64BIT*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	__HEAD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) ENTRY(startup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	 .level PA_ASM_LEVEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define PSW_W_SM	0x200
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define PSW_W_BIT       36
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	;! nuke the W bit, saving original value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	.level 2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	rsm	PSW_W_SM, %r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	.level 1.1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	extrw,u	%r1, PSW_W_BIT-32, 1, %r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	copy	%r1, %arg0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	/* Make sure sr4-sr7 are set to zero for the kernel address space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	mtsp    %r0,%sr4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	mtsp    %r0,%sr5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	mtsp    %r0,%sr6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	mtsp    %r0,%sr7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	/* Clear BSS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	.import _bss,data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	.import _ebss,data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	load32	BOOTADDR(_bss),%r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	load32	BOOTADDR(_ebss),%r4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	ldo	FRAME_SIZE(%r4),%sp	/* stack at end of bss */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) $bss_loop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	cmpb,<<,n %r3,%r4,$bss_loop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	stw,ma	%r0,4(%r3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	/* Initialize the global data pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	loadgp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	/* arg0..arg4 were set by palo. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	copy	%arg1, %r6		/* command line */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	copy	%arg2, %r7		/* rd-start */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	copy	%arg3, %r8		/* rd-end */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	load32	BOOTADDR(decompress_kernel),%r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #ifdef CONFIG_64BIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	.level PA_ASM_LEVEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	ssm	PSW_W_SM, %r0		/* set W-bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	depdi	0, 31, 32, %r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	load32	BOOTADDR(startup_continue), %r2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	bv,n	0(%r3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) startup_continue:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #ifdef CONFIG_64BIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	.level PA_ASM_LEVEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	rsm	PSW_W_SM, %r0		/* clear W-bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 	load32	KERNEL_BINARY_TEXT_START, %arg0 /* free mem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 	copy	%r6, %arg1		/* command line */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 	copy	%r7, %arg2		/* rd-start */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 	copy	%r8, %arg3		/* rd-end */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) 	bv,n	0(%ret0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) END(startup)