[PATCH 1/2] powerpc: Retire e200 core (mpc555x processor)

From: Christophe Leroy
Date: Tue Nov 17 2020 - 00:08:30 EST

There is no defconfig selecting CONFIG_E200, and no platform.

e200 is an earlier version of booke, a predecessor of e500,
with some particularities like an unified cache instead of both an
instruction cache and a data cache.

Remove it.

Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
---
arch/powerpc/Makefile | 1 -
arch/powerpc/include/asm/cputable.h | 11 -----
arch/powerpc/include/asm/mmu.h | 2 +-
arch/powerpc/include/asm/reg.h | 5 --
arch/powerpc/include/asm/reg_booke.h | 12 -----
arch/powerpc/kernel/cpu_setup_fsl_booke.S | 9 ----
arch/powerpc/kernel/cputable.c | 46 ------------------
arch/powerpc/kernel/head_booke.h | 3 +-
arch/powerpc/kernel/head_fsl_booke.S | 57 +----------------------
arch/powerpc/kernel/setup_32.c | 2 -
arch/powerpc/kernel/traps.c | 25 ----------
arch/powerpc/mm/nohash/fsl_booke.c | 12 ++---
arch/powerpc/platforms/Kconfig.cputype | 13 ++----
13 files changed, 11 insertions(+), 187 deletions(-)

diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index a4d56f0a41d9..16b8336f91dd 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -248,7 +248,6 @@ KBUILD_CFLAGS += $(call cc-option,-mno-string)
cpu-as-$(CONFIG_40x) += -Wa,-m405
cpu-as-$(CONFIG_44x) += -Wa,-m440
cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
-cpu-as-$(CONFIG_E200) += -Wa,-me200
cpu-as-$(CONFIG_E500) += -Wa,-me500

# When using '-many -mpower4' gas will first try and find a matching power4
diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
index 3d2f94afc13a..7d815a3e7206 100644
--- a/arch/powerpc/include/asm/cputable.h
+++ b/arch/powerpc/include/asm/cputable.h
@@ -41,7 +41,6 @@ extern int machine_check_4xx(struct pt_regs *regs);
extern int machine_check_440A(struct pt_regs *regs);
extern int machine_check_e500mc(struct pt_regs *regs);
extern int machine_check_e500(struct pt_regs *regs);
-extern int machine_check_e200(struct pt_regs *regs);
extern int machine_check_47x(struct pt_regs *regs);
int machine_check_8xx(struct pt_regs *regs);
int machine_check_83xx(struct pt_regs *regs);
@@ -383,10 +382,6 @@ static inline void cpu_feature_keys_init(void) { }
#define CPU_FTRS_440x6 (CPU_FTR_NODSISRALIGN | CPU_FTR_NOEXECUTE | \
CPU_FTR_INDEXED_DCR)
#define CPU_FTRS_47X (CPU_FTRS_440x6)
-#define CPU_FTRS_E200 (CPU_FTR_SPE_COMP | \
- CPU_FTR_NODSISRALIGN | CPU_FTR_COHERENT_ICACHE | \
- CPU_FTR_NOEXECUTE | \
- CPU_FTR_DEBUG_LVL_EXC)
#define CPU_FTRS_E500 (CPU_FTR_MAYBE_CAN_DOZE | \
CPU_FTR_SPE_COMP | CPU_FTR_MAYBE_CAN_NAP | CPU_FTR_NODSISRALIGN | \
CPU_FTR_NOEXECUTE)
@@ -535,9 +530,6 @@ enum {
#ifdef CONFIG_PPC_47x
CPU_FTRS_47X | CPU_FTR_476_DD2 |
#endif
-#ifdef CONFIG_E200
- CPU_FTRS_E200 |
-#endif
#ifdef CONFIG_E500
CPU_FTRS_E500 | CPU_FTRS_E500_2 |
#endif
@@ -608,9 +600,6 @@ enum {
#ifdef CONFIG_44x
CPU_FTRS_44X & CPU_FTRS_440x6 &
#endif
-#ifdef CONFIG_E200
- CPU_FTRS_E200 &
-#endif
#ifdef CONFIG_E500
CPU_FTRS_E500 & CPU_FTRS_E500_2 &
#endif
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index 255a1837e9f7..b724c38589a1 100644
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -166,7 +166,7 @@ enum {
#ifdef CONFIG_44x
MMU_FTR_TYPE_44x |
#endif
-#if defined(CONFIG_E200) || defined(CONFIG_E500)
+#ifdef CONFIG_E500
MMU_FTR_TYPE_FSL_E | MMU_FTR_BIG_PHYS | MMU_FTR_USE_TLBILX |
#endif
#ifdef CONFIG_PPC_47x
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index f877a576b338..3c81a6efaf23 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -1232,14 +1232,9 @@
#define SPRN_SPRG_WSCRATCH_MC SPRN_SPRG1
#define SPRN_SPRG_RSCRATCH4 SPRN_SPRG7R
#define SPRN_SPRG_WSCRATCH4 SPRN_SPRG7W
-#ifdef CONFIG_E200
-#define SPRN_SPRG_RSCRATCH_DBG SPRN_SPRG6R
-#define SPRN_SPRG_WSCRATCH_DBG SPRN_SPRG6W
-#else
#define SPRN_SPRG_RSCRATCH_DBG SPRN_SPRG9
#define SPRN_SPRG_WSCRATCH_DBG SPRN_SPRG9
#endif
-#endif

#ifdef CONFIG_PPC_8xx
#define SPRN_SPRG_SCRATCH0 SPRN_SPRG0
diff --git a/arch/powerpc/include/asm/reg_booke.h b/arch/powerpc/include/asm/reg_booke.h
index 29a948e0c0f2..262782f08fd4 100644
--- a/arch/powerpc/include/asm/reg_booke.h
+++ b/arch/powerpc/include/asm/reg_booke.h
@@ -281,18 +281,6 @@
#define MSRP_PMMP 0x00000004 /* Protect MSR[PMM] */
#endif

-#ifdef CONFIG_E200
-#define MCSR_MCP 0x80000000UL /* Machine Check Input Pin */
-#define MCSR_CP_PERR 0x20000000UL /* Cache Push Parity Error */
-#define MCSR_CPERR 0x10000000UL /* Cache Parity Error */
-#define MCSR_EXCP_ERR 0x08000000UL /* ISI, ITLB, or Bus Error on 1st insn
- fetch for an exception handler */
-#define MCSR_BUS_IRERR 0x00000010UL /* Read Bus Error on instruction fetch*/
-#define MCSR_BUS_DRERR 0x00000008UL /* Read Bus Error on data load */
-#define MCSR_BUS_WRERR 0x00000004UL /* Write Bus Error on buffered
- store or cache line push */
-#endif
-
/* Bit definitions for the HID1 */
#ifdef CONFIG_E500
/* e500v1/v2 */
diff --git a/arch/powerpc/kernel/cpu_setup_fsl_booke.S b/arch/powerpc/kernel/cpu_setup_fsl_booke.S
index 1d308780e0d3..4bf33f1b4193 100644
--- a/arch/powerpc/kernel/cpu_setup_fsl_booke.S
+++ b/arch/powerpc/kernel/cpu_setup_fsl_booke.S
@@ -108,15 +108,6 @@ _GLOBAL(__setup_cpu_e6500)
#endif /* CONFIG_PPC_E500MC */

#ifdef CONFIG_PPC32
-#ifdef CONFIG_E200
-_GLOBAL(__setup_cpu_e200)
- /* enable dedicated debug exception handling resources (Debug APU) */
- mfspr r3,SPRN_HID0
- ori r3,r3,HID0_DAPUEN@l
- mtspr SPRN_HID0,r3
- b __setup_e200_ivors
-#endif /* CONFIG_E200 */
-
#ifdef CONFIG_E500
#ifndef CONFIG_PPC_E500MC
_GLOBAL(__setup_cpu_e500v1)
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 29de58d4dfb7..38871c8a69e2 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -36,7 +36,6 @@ const char *powerpc_base_platform;
* and ppc64
*/
#ifdef CONFIG_PPC32
-extern void __setup_cpu_e200(unsigned long offset, struct cpu_spec* spec);
extern void __setup_cpu_e500v1(unsigned long offset, struct cpu_spec* spec);
extern void __setup_cpu_e500v2(unsigned long offset, struct cpu_spec* spec);
extern void __setup_cpu_e500mc(unsigned long offset, struct cpu_spec* spec);
@@ -1893,51 +1892,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
.platform = "ppc440",
}
#endif /* CONFIG_44x */
-#ifdef CONFIG_E200
- { /* e200z5 */
- .pvr_mask = 0xfff00000,
- .pvr_value = 0x81000000,
- .cpu_name = "e200z5",
- /* xxx - galak: add CPU_FTR_MAYBE_CAN_DOZE */
- .cpu_features = CPU_FTRS_E200,
- .cpu_user_features = COMMON_USER_BOOKE |
- PPC_FEATURE_HAS_EFP_SINGLE |
- PPC_FEATURE_UNIFIED_CACHE,
- .mmu_features = MMU_FTR_TYPE_FSL_E,
- .dcache_bsize = 32,
- .machine_check = machine_check_e200,
- .platform = "ppc5554",
- },
- { /* e200z6 */
- .pvr_mask = 0xfff00000,
- .pvr_value = 0x81100000,
- .cpu_name = "e200z6",
- /* xxx - galak: add CPU_FTR_MAYBE_CAN_DOZE */
- .cpu_features = CPU_FTRS_E200,
- .cpu_user_features = COMMON_USER_BOOKE |
- PPC_FEATURE_HAS_SPE_COMP |
- PPC_FEATURE_HAS_EFP_SINGLE_COMP |
- PPC_FEATURE_UNIFIED_CACHE,
- .mmu_features = MMU_FTR_TYPE_FSL_E,
- .dcache_bsize = 32,
- .machine_check = machine_check_e200,
- .platform = "ppc5554",
- },
- { /* default match */
- .pvr_mask = 0x00000000,
- .pvr_value = 0x00000000,
- .cpu_name = "(generic E200 PPC)",
- .cpu_features = CPU_FTRS_E200,
- .cpu_user_features = COMMON_USER_BOOKE |
- PPC_FEATURE_HAS_EFP_SINGLE |
- PPC_FEATURE_UNIFIED_CACHE,
- .mmu_features = MMU_FTR_TYPE_FSL_E,
- .dcache_bsize = 32,
- .cpu_setup = __setup_cpu_e200,
- .machine_check = machine_check_e200,
- .platform = "ppc5554",
- }
-#endif /* CONFIG_E200 */
#endif /* CONFIG_PPC32 */
#ifdef CONFIG_E500
#ifdef CONFIG_PPC32
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index 71c359d438b5..2ffbe924ec83 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -185,7 +185,6 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_EMB_HV)
*
* On 40x critical is the only additional level
* On 44x/e500 we have critical and machine check
- * On e200 we have critical and debug (machine check occurs via critical)
*
* Additionally we reserve a SPRG for each priority level so we can free up a
* GPR to use as the base for indirect access to the exception stacks. This
@@ -201,7 +200,7 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_EMB_HV)
#define MC_STACK_BASE mcheckirq_ctx
#define CRIT_STACK_BASE critirq_ctx

-/* only on e500mc/e200 */
+/* only on e500mc */
#define DBG_STACK_BASE dbgirq_ctx

#define EXC_LVL_FRAME_OVERHEAD (THREAD_SIZE - INT_FRAME_SIZE - EXC_LVL_SIZE)
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index 586a6ac501e9..fdd4d274c245 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -187,9 +187,6 @@ set_ivor:

/* Setup the defaults for TLB entries */
li r2,(MAS4_TSIZED(BOOK3E_PAGESZ_4K))@l
-#ifdef CONFIG_E200
- oris r2,r2,MAS4_TLBSELD(1)@h
-#endif
mtspr SPRN_MAS4, r2

#if !defined(CONFIG_BDI_SWITCH)
@@ -362,13 +359,7 @@ interrupt_base:
CRITICAL_EXCEPTION(0x0100, CRITICAL, CriticalInput, unknown_exception)

/* Machine Check Interrupt */
-#ifdef CONFIG_E200
- /* no RFMCI, MCSRRs on E200 */
- CRITICAL_EXCEPTION(0x0200, MACHINE_CHECK, MachineCheck, \
- machine_check_exception)
-#else
MCHECK_EXCEPTION(0x0200, MachineCheck, machine_check_exception)
-#endif

/* Data Storage Interrupt */
START_EXCEPTION(DataStorage)
@@ -399,15 +390,9 @@ interrupt_base:
/* Floating Point Unavailable Interrupt */
#ifdef CONFIG_PPC_FPU
FP_UNAVAILABLE_EXCEPTION
-#else
-#ifdef CONFIG_E200
- /* E200 treats 'normal' floating point instructions as FP Unavail exception */
- EXCEPTION(0x0800, FP_UNAVAIL, FloatingPointUnavailable, \
- program_check_exception, EXC_XFER_STD)
#else
EXCEPTION(0x0800, FP_UNAVAIL, FloatingPointUnavailable, \
unknown_exception, EXC_XFER_STD)
-#endif
#endif

/* System Call Interrupt */
@@ -625,7 +610,7 @@ END_BTB_FLUSH_SECTION
mfspr r10, SPRN_SPRG_RSCRATCH0
b InstructionStorage

-/* Define SPE handlers for e200 and e500v2 */
+/* Define SPE handlers for e500v2 */
#ifdef CONFIG_SPE
/* SPE Unavailable */
START_EXCEPTION(SPEUnavailable)
@@ -807,31 +792,6 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_BIG_PHYS)
#endif
3: mtspr SPRN_MAS2, r12

-#ifdef CONFIG_E200
- /* Round robin TLB1 entries assignment */
- mfspr r12, SPRN_MAS0
-
- /* Extract TLB1CFG(NENTRY) */
- mfspr r11, SPRN_TLB1CFG
- andi. r11, r11, 0xfff
-
- /* Extract MAS0(NV) */
- andi. r13, r12, 0xfff
- addi r13, r13, 1
- cmpw 0, r13, r11
- addi r12, r12, 1
-
- /* check if we need to wrap */
- blt 7f
-
- /* wrap back to first free tlbcam entry */
- lis r13, tlbcam_index@ha
- lwz r13, tlbcam_index@l(r13)
- rlwimi r12, r13, 0, 20, 31
-7:
- mtspr SPRN_MAS0,r12
-#endif /* CONFIG_E200 */
-
tlb_write_entry:
tlbwe

@@ -933,21 +893,6 @@ get_phys_addr:
* Global functions
*/

-#ifdef CONFIG_E200
-/* Adjust or setup IVORs for e200 */
-_GLOBAL(__setup_e200_ivors)
- li r3,DebugDebug@l
- mtspr SPRN_IVOR15,r3
- li r3,SPEUnavailable@l
- mtspr SPRN_IVOR32,r3
- li r3,SPEFloatingPointData@l
- mtspr SPRN_IVOR33,r3
- li r3,SPEFloatingPointRound@l
- mtspr SPRN_IVOR34,r3
- sync
- blr
-#endif
-
#ifdef CONFIG_E500
#ifndef CONFIG_PPC_E500MC
/* Adjust or setup IVORs for e500v1/v2 */
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 057d6b8e9bb0..416e2c7a8b0a 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -223,6 +223,4 @@ __init void initialize_cache_info(void)
dcache_bsize = cur_cpu_spec->dcache_bsize;
icache_bsize = cur_cpu_spec->icache_bsize;
ucache_bsize = 0;
- if (IS_ENABLED(CONFIG_E200))
- ucache_bsize = icache_bsize = dcache_bsize;
}
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 5006dcbe1d9f..129d2d72b336 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -757,31 +757,6 @@ int machine_check_generic(struct pt_regs *regs)
{
return 0;
}
-#elif defined(CONFIG_E200)
-int machine_check_e200(struct pt_regs *regs)
-{
- unsigned long reason = mfspr(SPRN_MCSR);
-
- printk("Machine check in kernel mode.\n");
- printk("Caused by (from MCSR=%lx): ", reason);
-
- if (reason & MCSR_MCP)
- pr_cont("Machine Check Signal\n");
- if (reason & MCSR_CP_PERR)
- pr_cont("Cache Push Parity Error\n");
- if (reason & MCSR_CPERR)
- pr_cont("Cache Parity Error\n");
- if (reason & MCSR_EXCP_ERR)
- pr_cont("ISI, ITLB, or Bus Error on first instruction fetch for an exception handler\n");
- if (reason & MCSR_BUS_IRERR)
- pr_cont("Bus - Read Bus Error on instruction fetch\n");
- if (reason & MCSR_BUS_DRERR)
- pr_cont("Bus - Read Bus Error on data load\n");
- if (reason & MCSR_BUS_WRERR)
- pr_cont("Bus - Write Bus Error on buffered store or cache line push\n");
-
- return 0;
-}
#elif defined(CONFIG_PPC32)
int machine_check_generic(struct pt_regs *regs)
{
diff --git a/arch/powerpc/mm/nohash/fsl_booke.c b/arch/powerpc/mm/nohash/fsl_booke.c
index 36bda962d3b3..03dacbe940e5 100644
--- a/arch/powerpc/mm/nohash/fsl_booke.c
+++ b/arch/powerpc/mm/nohash/fsl_booke.c
@@ -223,15 +223,9 @@ void flush_instruction_cache(void)
{
unsigned long tmp;

- if (IS_ENABLED(CONFIG_E200)) {
- tmp = mfspr(SPRN_L1CSR0);
- tmp |= L1CSR0_CFI | L1CSR0_CLFC;
- mtspr(SPRN_L1CSR0, tmp);
- } else {
- tmp = mfspr(SPRN_L1CSR1);
- tmp |= L1CSR1_ICFI | L1CSR1_ICLFR;
- mtspr(SPRN_L1CSR1, tmp);
- }
+ tmp = mfspr(SPRN_L1CSR1);
+ tmp |= L1CSR1_ICFI | L1CSR1_ICLFR;
+ mtspr(SPRN_L1CSR1, tmp);
isync();
}

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index c194c4ae8bc7..7d8526cd011e 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -23,7 +23,7 @@ choice
The most common ones are the desktop and server CPUs (603,
604, 740, 750, 74xx) CPUs from Freescale and IBM, with their
embedded 512x/52xx/82xx/83xx/86xx counterparts.
- The other embedded parts, namely 4xx, 8xx, e200 (55xx) and e500
+ The other embedded parts, namely 4xx, 8xx and e500
(85xx) each form a family of their own that is not compatible
with the others.

@@ -66,9 +66,6 @@ config 44x
select HAVE_PCI
select PHYS_64BIT

-config E200
- bool "Freescale e200"
-
endchoice

choice
@@ -247,12 +244,12 @@ config 4xx

config BOOKE
bool
- depends on E200 || E500 || 44x || PPC_BOOK3E
+ depends on E500 || 44x || PPC_BOOK3E
default y

config FSL_BOOKE
bool
- depends on (E200 || E500) && PPC32
+ depends on E500 && PPC32
default y

# this is for common code between PPC32 & PPC64 FSL BOOKE
@@ -317,7 +314,7 @@ config VSX

config SPE_POSSIBLE
def_bool y
- depends on E200 || (E500 && !PPC_E500MC)
+ depends on E500 && !PPC_E500MC

config SPE
bool "SPE Support"
@@ -464,7 +461,7 @@ config NR_CPUS

config NOT_COHERENT_CACHE
bool
- depends on 4xx || PPC_8xx || E200 || PPC_MPC512x || \
+ depends on 4xx || PPC_8xx || PPC_MPC512x || \
GAMECUBE_COMMON || AMIGAONE
select ARCH_HAS_DMA_PREP_COHERENT
select ARCH_HAS_SYNC_DMA_FOR_DEVICE
--
2.25.0