MIPS: unify CPU code in arch/mips/cpu/

Unify and move code in arch/mips/cpu/mips[32|64]/ to arch/mips/cpu/.
The CPU specific config.mk files need to remain until
CONFIG_STANDALONE_LOAD_ADDR is converted to a global Kconfig symbol.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

arch/mips/Makefile

@@ -2,11 +2,9 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-head-$(CONFIG_CPU_MIPS32) := arch/mips/cpu/mips32/start.o
-head-$(CONFIG_CPU_MIPS64) := arch/mips/cpu/mips64/start.o
+head-y := arch/mips/cpu/start.o
 
-libs-$(CONFIG_CPU_MIPS32) += arch/mips/cpu/mips32/
-libs-$(CONFIG_CPU_MIPS64) += arch/mips/cpu/mips64/
+libs-y += arch/mips/cpu/
 libs-y += arch/mips/lib/
 
 libs-$(CONFIG_SOC_AU1X00) += arch/mips/mach-au1x00/

arch/mips/cpu/Makefile

@@ -0,0 +1,9 @@
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+extra-y	= start.o
+
+obj-y += time.o
+obj-y += interrupts.o
+obj-y += cpu.o

arch/mips/cpu/mips64/cpu.c → arch/mips/cpu/cpu.c

@@ -8,10 +8,11 @@
 #include <common.h>
 #include <command.h>
 #include <netdev.h>
+#include <linux/compiler.h>
 #include <asm/mipsregs.h>
 #include <asm/reboot.h>
 
-void __attribute__((weak)) _machine_restart(void)
+void __weak _machine_restart(void)
 {
 	fprintf(stderr, "*** reset failed ***\n");
 

arch/mips/cpu/mips32/Makefile

@@ -1,9 +0,0 @@
-#
-# (C) Copyright 2003-2006
-# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
-
-extra-y	= start.o
-obj-y	= cpu.o interrupts.o time.o

arch/mips/cpu/mips32/cpu.c

@@ -1,34 +0,0 @@
-/*
- * (C) Copyright 2003
- * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <common.h>
-#include <command.h>
-#include <netdev.h>
-#include <asm/mipsregs.h>
-#include <asm/reboot.h>
-
-void __attribute__((weak)) _machine_restart(void)
-{
-}
-
-int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
-{
-	_machine_restart();
-
-	fprintf(stderr, "*** reset failed ***\n");
-	return 0;
-}
-
-void write_one_tlb(int index, u32 pagemask, u32 hi, u32 low0, u32 low1)
-{
-	write_c0_entrylo0(low0);
-	write_c0_pagemask(pagemask);
-	write_c0_entrylo1(low1);
-	write_c0_entryhi(hi);
-	write_c0_index(index);
-	tlb_write_indexed();
-}

arch/mips/cpu/mips64/Makefile

@@ -1,9 +0,0 @@
-#
-# (C) Copyright 2003-2006
-# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
-
-extra-y	= start.o
-obj-y	= cpu.o interrupts.o time.o

arch/mips/cpu/mips64/interrupts.c

@@ -1,22 +0,0 @@
-/*
- * (C) Copyright 2003
- * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <common.h>
-
-int interrupt_init(void)
-{
-	return 0;
-}
-
-void enable_interrupts(void)
-{
-}
-
-int disable_interrupts(void)
-{
-	return 0;
-}

arch/mips/cpu/mips64/start.S

@@ -1,291 +0,0 @@
-/*
- *  Startup Code for MIPS64 CPU-core
- *
- *  Copyright (c) 2003	Wolfgang Denk <wd@denx.de>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <asm-offsets.h>
-#include <config.h>
-#include <asm/regdef.h>
-#include <asm/mipsregs.h>
-
-#ifndef CONFIG_SYS_MIPS_CACHE_MODE
-#define CONFIG_SYS_MIPS_CACHE_MODE CONF_CM_CACHABLE_NONCOHERENT
-#endif
-
-#ifndef CONFIG_SYS_INIT_SP_ADDR
-#define CONFIG_SYS_INIT_SP_ADDR	(CONFIG_SYS_SDRAM_BASE + \
-				CONFIG_SYS_INIT_SP_OFFSET)
-#endif
-
-#ifdef CONFIG_SYS_LITTLE_ENDIAN
-#define MIPS64_R_INFO(ssym, r_type3, r_type2, r_type) \
-	(((r_type) << 24) | ((r_type2) << 16) | ((r_type3) << 8) | (ssym))
-#else
-#define MIPS64_R_INFO(ssym, r_type3, r_type2, r_type) \
-	((r_type) | ((r_type2) << 8) | ((r_type3) << 16) | (ssym) << 24)
-#endif
-
-	/*
-	 * For the moment disable interrupts, mark the kernel mode and
-	 * set ST0_KX so that the CPU does not spit fire when using
-	 * 64-bit addresses.
-	 */
-	.macro	setup_c0_status set clr
-	.set	push
-	mfc0	t0, CP0_STATUS
-	or	t0, ST0_CU0 | \set | 0x1f | \clr
-	xor	t0, 0x1f | \clr
-	mtc0	t0, CP0_STATUS
-	.set	noreorder
-	sll	zero, 3				# ehb
-	.set	pop
-	.endm
-
-	.set noreorder
-
-	.globl _start
-	.text
-_start:
-	/* U-boot entry point */
-	b	reset
-	 nop
-
-	.org 0x200
-	/* TLB refill, 32 bit task */
-1:	b	1b
-	 nop
-
-	.org 0x280
-	/* XTLB refill, 64 bit task */
-1:	b	1b
-	 nop
-
-	.org 0x300
-	/* Cache error exception */
-1:	b	1b
-	 nop
-
-	.org 0x380
-	/* General exception */
-1:	b	1b
-	 nop
-
-	.org 0x400
-	/* Catch interrupt exceptions */
-1:	b	1b
-	 nop
-
-	.org 0x480
-	/* EJTAG debug exception */
-1:	b	1b
-	 nop
-
-	.align 4
-reset:
-
-	/* Clear watch registers */
-	dmtc0	zero, CP0_WATCHLO
-	dmtc0	zero, CP0_WATCHHI
-
-	/* WP(Watch Pending), SW0/1 should be cleared */
-	mtc0	zero, CP0_CAUSE
-
-	setup_c0_status ST0_KX 0
-
-	/* Init Timer */
-	mtc0	zero, CP0_COUNT
-	mtc0	zero, CP0_COMPARE
-
-#ifndef CONFIG_SKIP_LOWLEVEL_INIT
-	/* CONFIG0 register */
-	dli	t0, CONF_CM_UNCACHED
-	mtc0	t0, CP0_CONFIG
-#endif
-
-	/*
-	 * Initialize $gp, force 8 byte alignment of bal instruction to forbid
-	 * the compiler to put nop's between bal and _gp. This is required to
-	 * keep _gp and ra aligned to 8 byte.
-	 */
-	.align	3
-	bal	1f
-	 nop
-	.dword	_gp
-1:
-	ld	gp, 0(ra)
-
-#ifndef CONFIG_SKIP_LOWLEVEL_INIT
-	/* Initialize any external memory */
-	dla	t9, lowlevel_init
-	jalr	t9
-	 nop
-
-	/* Initialize caches... */
-	dla	t9, mips_cache_reset
-	jalr	t9
-	 nop
-
-	/* ... and enable them */
-	dli	t0, CONFIG_SYS_MIPS_CACHE_MODE
-	mtc0	t0, CP0_CONFIG
-#endif
-
-	/* Set up temporary stack */
-	dli	t0, -16
-	dli	t1, CONFIG_SYS_INIT_SP_ADDR
-	and	sp, t1, t0		# force 16 byte alignment
-	dsub	sp, sp, GD_SIZE		# reserve space for gd
-	and	sp, sp, t0		# force 16 byte alignment
-	move	k0, sp			# save gd pointer
-#ifdef CONFIG_SYS_MALLOC_F_LEN
-	dli	t2, CONFIG_SYS_MALLOC_F_LEN
-	dsub	sp, sp, t2		# reserve space for early malloc
-	and	sp, sp, t0		# force 16 byte alignment
-#endif
-	move	fp, sp
-
-	/* Clear gd */
-	move	t0, k0
-1:
-	sw	zero, 0(t0)
-	blt	t0, t1, 1b
-	 daddi	t0, 4
-
-#ifdef CONFIG_SYS_MALLOC_F_LEN
-	daddu	t0, k0, GD_MALLOC_BASE	# gd->malloc_base offset
-	sw	sp, 0(t0)
-#endif
-
-	dla	t9, board_init_f
-	jr	t9
-	 move	ra, zero
-
-/*
- * void relocate_code (addr_sp, gd, addr_moni)
- *
- * This "function" does not return, instead it continues in RAM
- * after relocating the monitor code.
- *
- * a0 = addr_sp
- * a1 = gd
- * a2 = destination address
- */
-	.globl	relocate_code
-	.ent	relocate_code
-relocate_code:
-	move	sp, a0			# set new stack pointer
-	move	fp, sp
-
-	move	s0, a1			# save gd in s0
-	move	s2, a2			# save destination address in s2
-
-	dli	t0, CONFIG_SYS_MONITOR_BASE
-	dsub	s1, s2, t0		# s1 <-- relocation offset
-
-	dla	t3, in_ram
-	ld	t2, -24(t3)		# t2 <-- __image_copy_end
-	move	t1, a2
-
-	dadd	gp, s1			# adjust gp
-
-	/*
-	 * t0 = source address
-	 * t1 = target address
-	 * t2 = source end address
-	 */
-1:
-	lw	t3, 0(t0)
-	sw	t3, 0(t1)
-	daddu	t0, 4
-	blt	t0, t2, 1b
-	 daddu	t1, 4
-
-	/* If caches were enabled, we would have to flush them here. */
-	dsub	a1, t1, s2		# a1 <-- size
-	dla	t9, flush_cache
-	jalr	t9
-	 move	a0, s2			# a0 <-- destination address
-
-	/* Jump to where we've relocated ourselves */
-	daddi	t0, s2, in_ram - _start
-	jr	t0
-	 nop
-
-	.dword	__rel_dyn_end
-	.dword	__rel_dyn_start
-	.dword	__image_copy_end
-	.dword	_GLOBAL_OFFSET_TABLE_
-	.dword	num_got_entries
-
-in_ram:
-	/*
-	 * Now we want to update GOT.
-	 *
-	 * GOT[0] is reserved. GOT[1] is also reserved for the dynamic object
-	 * generated by GNU ld. Skip these reserved entries from relocation.
-	 */
-	ld	t3, -8(t0)		# t3 <-- num_got_entries
-	ld	t8, -16(t0)		# t8 <-- _GLOBAL_OFFSET_TABLE_
-	dadd	t8, s1			# t8 now holds relocated _G_O_T_
-	daddi	t8, t8, 16		# skipping first two entries
-	dli	t2, 2
-1:
-	ld	t1, 0(t8)
-	beqz	t1, 2f
-	 dadd	t1, s1
-	sd	t1, 0(t8)
-2:
-	daddi	t2, 1
-	blt	t2, t3, 1b
-	 daddi	t8, 8
-
-	/* Update dynamic relocations */
-	ld	t1, -32(t0)		# t1 <-- __rel_dyn_start
-	ld	t2, -40(t0)		# t2 <-- __rel_dyn_end
-
-	b	2f			# skip first reserved entry
-	 daddi	t1, 16
-
-1:
-	lw	t8, -4(t1)		# t8 <-- relocation info
-
-	dli	t3, MIPS64_R_INFO(0x00, 0x00, 0x12, 0x03)
-	bne	t8, t3, 2f		# skip non R_MIPS_REL32 entries
-	 nop
-
-	ld	t3, -16(t1)		# t3 <-- location to fix up in FLASH
-
-	ld	t8, 0(t3)		# t8 <-- original pointer
-	dadd	t8, s1			# t8 <-- adjusted pointer
-
-	dadd	t3, s1			# t3 <-- location to fix up in RAM
-	sd	t8, 0(t3)
-
-2:
-	blt	t1, t2, 1b
-	 daddi	t1, 16			# each rel.dyn entry is 16 bytes
-
-	/*
-	 * Clear BSS
-	 *
-	 * GOT is now relocated. Thus __bss_start and __bss_end can be
-	 * accessed directly via $gp.
-	 */
-	dla	t1, __bss_start		# t1 <-- __bss_start
-	dla	t2, __bss_end		# t2 <-- __bss_end
-
-1:
-	sd	zero, 0(t1)
-	blt	t1, t2, 1b
-	 daddi	t1, 8
-
-	move	a0, s0			# a0 <-- gd
-	move	a1, s2
-	dla	t9, board_init_r
-	jr	t9
-	 move	ra, zero
-
-	.end	relocate_code

arch/mips/cpu/mips64/time.c

@@ -1,19 +0,0 @@
-/*
- * (C) Copyright 2003
- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <common.h>
-#include <asm/mipsregs.h>
-
-unsigned long notrace timer_read_counter(void)
-{
-	return read_c0_count();
-}
-
-ulong notrace get_tbclk(void)
-{
-	return CONFIG_SYS_MIPS_TIMER_FREQ;
-}