powerpc: Replace CONFIG_4xx with CONFIG_44x

Replace 4xx usage with 44x, and replace 4xx_SOC with 44x.

Also, as pointed out by Christophe, if 44x || BOOKE can be simplified to
just test BOOKE, because 44x always selects BOOKE.

Retain the CONFIG_4xx symbol, as there are drivers that use it to mean
4xx || 44x, those will need updating before CONFIG_4xx can be removed.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240628121201.130802-6-mpe@ellerman.id.au

arch/powerpc/Kconfig

@@ -490,7 +490,7 @@ source "kernel/Kconfig.hz"
 
 config MATH_EMULATION
 	bool "Math emulation"
-	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT
+	depends on 44x || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT
 	select PPC_FPU_REGS
 	help
 	  Some PowerPC chips designed for embedded applications do not have
@@ -1108,9 +1108,6 @@ config PPC4xx_CPM
 	  It also enables support for two different idle states (idle-wait
 	  and idle-doze).
 
-config 4xx_SOC
-	bool
-
 config FSL_LBC
 	bool "Freescale Local Bus support"
 	help

arch/powerpc/include/asm/cacheflush.h

@@ -121,7 +121,7 @@ static inline void invalidate_dcache_range(unsigned long start,
 	mb();	/* sync */
 }
 
-#ifdef CONFIG_4xx
+#ifdef CONFIG_44x
 static inline void flush_instruction_cache(void)
 {
 	iccci((void *)KERNELBASE);

arch/powerpc/include/asm/ppc_asm.h

@@ -482,7 +482,7 @@ END_FTR_SECTION_NESTED(CPU_FTR_CELL_TB_BUG, CPU_FTR_CELL_TB_BUG, 96)
  * and they must be used.
  */
 
-#if !defined(CONFIG_4xx) && !defined(CONFIG_PPC_8xx)
+#if !defined(CONFIG_44x) && !defined(CONFIG_PPC_8xx)
 #define tlbia					\
 	li	r4,1024;			\
 	mtctr	r4;				\

arch/powerpc/kernel/entry_32.S

@@ -211,7 +211,7 @@ start_kernel_thread:
 
 	.globl	fast_exception_return
 fast_exception_return:
-#if !(defined(CONFIG_4xx) || defined(CONFIG_BOOKE))
+#ifndef CONFIG_BOOKE
 	andi.	r10,r9,MSR_RI		/* check for recoverable interrupt */
 	beq	3f			/* if not, we've got problems */
 #endif
@@ -365,7 +365,7 @@ ALT_FTR_SECTION_END_IFCLR(CPU_FTR_STCX_CHECKS_ADDRESS)
 	rfi
 _ASM_NOKPROBE_SYMBOL(interrupt_return)
 
-#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
+#ifdef CONFIG_BOOKE
 
 /*
  * Returning from a critical interrupt in user mode doesn't need
@@ -444,7 +444,6 @@ _ASM_NOKPROBE_SYMBOL(interrupt_return)
 #define RESTORE_MMU_REGS
 #endif
 
-#ifdef CONFIG_BOOKE
 	.globl	ret_from_crit_exc
 ret_from_crit_exc:
 	RESTORE_xSRR(SRR0,SRR1);
@@ -469,4 +468,3 @@ ret_from_mcheck_exc:
 	RET_FROM_EXC_LEVEL(SPRN_MCSRR0, SPRN_MCSRR1, PPC_RFMCI)
 _ASM_NOKPROBE_SYMBOL(ret_from_mcheck_exc)
 #endif /* CONFIG_BOOKE */
-#endif /* !(CONFIG_4xx || CONFIG_BOOKE) */

arch/powerpc/kernel/process.c

@@ -1573,7 +1573,7 @@ static void __show_regs(struct pt_regs *regs)
 	if (trap == INTERRUPT_MACHINE_CHECK ||
 	    trap == INTERRUPT_DATA_STORAGE ||
 	    trap == INTERRUPT_ALIGNMENT) {
-		if (IS_ENABLED(CONFIG_4xx) || IS_ENABLED(CONFIG_BOOKE))
+		if (IS_ENABLED(CONFIG_BOOKE))
 			pr_cont("DEAR: "REG" ESR: "REG" ", regs->dear, regs->esr);
 		else
 			pr_cont("DAR: "REG" DSISR: %08lx ", regs->dar, regs->dsisr);

arch/powerpc/mm/fault.c

@@ -368,13 +368,13 @@ static void sanity_check_fault(bool is_write, bool is_user,
  * Define the correct "is_write" bit in error_code based
  * on the processor family
  */
-#if (defined(CONFIG_4xx) || defined(CONFIG_BOOKE))
+#ifdef CONFIG_BOOKE
 #define page_fault_is_write(__err)	((__err) & ESR_DST)
 #else
 #define page_fault_is_write(__err)	((__err) & DSISR_ISSTORE)
 #endif
 
-#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
+#ifdef CONFIG_BOOKE
 #define page_fault_is_bad(__err)	(0)
 #elif defined(CONFIG_PPC_8xx)
 #define page_fault_is_bad(__err)	((__err) & DSISR_NOEXEC_OR_G)

arch/powerpc/mm/ptdump/Makefile

@@ -2,7 +2,7 @@
 
 obj-y	+= ptdump.o
 
-obj-$(CONFIG_4xx)		+= shared.o
+obj-$(CONFIG_44x)		+= shared.o
 obj-$(CONFIG_PPC_8xx)		+= 8xx.o
 obj-$(CONFIG_PPC_E500)		+= shared.o
 obj-$(CONFIG_PPC_BOOK3S_32)	+= shared.o

arch/powerpc/platforms/4xx/Makefile

 # SPDX-License-Identifier: GPL-2.0-only
 obj-y				+= uic.o machine_check.o
-obj-$(CONFIG_4xx_SOC)		+= soc.o
+obj-$(CONFIG_44x)		+= soc.o
 obj-$(CONFIG_PCI)		+= pci.o
 obj-$(CONFIG_PPC4xx_HSTA_MSI)	+= hsta_msi.o
 obj-$(CONFIG_PPC4xx_CPM)	+= cpm.o

arch/powerpc/platforms/Kconfig.cputype

@@ -47,7 +47,6 @@ config 44x
 	bool "AMCC 44x, 46x or 47x"
 	select PPC_DCR_NATIVE
 	select PPC_UDBG_16550
-	select 4xx_SOC
 	select HAVE_PCI
 	select PHYS_64BIT
 	select PPC_KUEP
@@ -564,7 +563,7 @@ config NR_CPUS
 
 config NOT_COHERENT_CACHE
 	bool
-	depends on 4xx || PPC_8xx || PPC_MPC512x || \
+	depends on 44x || PPC_8xx || PPC_MPC512x || \
 		GAMECUBE_COMMON || AMIGAONE
 	select ARCH_HAS_DMA_PREP_COHERENT
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE

arch/powerpc/sysdev/Kconfig

@@ -5,12 +5,12 @@
 
 config PPC4xx_PCI_EXPRESS
 	bool
-	depends on PCI && 4xx
+	depends on PCI && 44x
 
 config PPC4xx_HSTA_MSI
 	bool
 	depends on PCI_MSI
-	depends on PCI && 4xx
+	depends on PCI && 44x
 
 config PPC_MSI_BITMAP
 	bool