ARM: 8754/1: NOMMU: Move PMSAv7 MPU under it's own namespace

We are going to support different MPU which programming model is not
compatible to PMSAv7, so move PMSAv7 MPU under it's own namespace.

Tested-by: Szemz? András <sza@esh.hu>
Tested-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

6 files changed, 133 insertions, 110 deletions

diff --git a/arch/arm/include/asm/mpu.h b/arch/arm/include/asm/mpu.h
index 6d1491c..fbde275 100644
--- a/arch/arm/include/asm/mpu.h
+++ b/arch/arm/include/asm/mpu.h
@@ -14,50 +14,50 @@
 #define MMFR0_PMSAv7		(3 << 4)
 
 /* MPU D/I Size Register fields */
-#define MPU_RSR_SZ		1
-#define MPU_RSR_EN		0
-#define MPU_RSR_SD		8
+#define PMSAv7_RSR_SZ		1
+#define PMSAv7_RSR_EN		0
+#define PMSAv7_RSR_SD		8
 
 /* Number of subregions (SD) */
-#define MPU_NR_SUBREGS		8
-#define MPU_MIN_SUBREG_SIZE	256
+#define PMSAv7_NR_SUBREGS	8
+#define PMSAv7_MIN_SUBREG_SIZE	256
 
 /* The D/I RSR value for an enabled region spanning the whole of memory */
-#define MPU_RSR_ALL_MEM		63
+#define PMSAv7_RSR_ALL_MEM	63
 
 /* Individual bits in the DR/IR ACR */
-#define MPU_ACR_XN		(1 << 12)
-#define MPU_ACR_SHARED		(1 << 2)
+#define PMSAv7_ACR_XN		(1 << 12)
+#define PMSAv7_ACR_SHARED	(1 << 2)
 
 /* C, B and TEX[2:0] bits only have semantic meanings when grouped */
-#define MPU_RGN_CACHEABLE	0xB
-#define MPU_RGN_SHARED_CACHEABLE (MPU_RGN_CACHEABLE | MPU_ACR_SHARED)
-#define MPU_RGN_STRONGLY_ORDERED 0
+#define PMSAv7_RGN_CACHEABLE		0xB
+#define PMSAv7_RGN_SHARED_CACHEABLE	(PMSAv7_RGN_CACHEABLE | PMSAv7_ACR_SHARED)
+#define PMSAv7_RGN_STRONGLY_ORDERED	0
 
 /* Main region should only be shared for SMP */
 #ifdef CONFIG_SMP
-#define MPU_RGN_NORMAL		(MPU_RGN_CACHEABLE | MPU_ACR_SHARED)
+#define PMSAv7_RGN_NORMAL	(PMSAv7_RGN_CACHEABLE | PMSAv7_ACR_SHARED)
 #else
-#define MPU_RGN_NORMAL		MPU_RGN_CACHEABLE
+#define PMSAv7_RGN_NORMAL	PMSAv7_RGN_CACHEABLE
 #endif
 
 /* Access permission bits of ACR (only define those that we use)*/
-#define MPU_AP_PL1RO_PL0NA	(0x5 << 8)
-#define MPU_AP_PL1RW_PL0RW	(0x3 << 8)
-#define MPU_AP_PL1RW_PL0R0	(0x2 << 8)
-#define MPU_AP_PL1RW_PL0NA	(0x1 << 8)
+#define PMSAv7_AP_PL1RO_PL0NA	(0x5 << 8)
+#define PMSAv7_AP_PL1RW_PL0RW	(0x3 << 8)
+#define PMSAv7_AP_PL1RW_PL0R0	(0x2 << 8)
+#define PMSAv7_AP_PL1RW_PL0NA	(0x1 << 8)
 
 /* For minimal static MPU region configurations */
-#define MPU_PROBE_REGION	0
-#define MPU_BG_REGION		1
-#define MPU_RAM_REGION		2
-#define MPU_ROM_REGION		3
+#define PMSAv7_PROBE_REGION	0
+#define PMSAv7_BG_REGION	1
+#define PMSAv7_RAM_REGION	2
+#define PMSAv7_ROM_REGION	3
 
 /* Maximum number of regions Linux is interested in */
-#define MPU_MAX_REGIONS		16
+#define MPU_MAX_REGIONS	16
 
-#define MPU_DATA_SIDE		0
-#define MPU_INSTR_SIDE		1
+#define PMSAv7_DATA_SIDE	0
+#define PMSAv7_INSTR_SIDE	1
 
 #ifndef __ASSEMBLY__
 
@@ -75,16 +75,12 @@ struct mpu_rgn_info {
 extern struct mpu_rgn_info mpu_rgn_info;
 
 #ifdef CONFIG_ARM_MPU
-
-extern void __init adjust_lowmem_bounds_mpu(void);
-extern void __init mpu_setup(void);
-
+extern void __init pmsav7_adjust_lowmem_bounds(void);
+extern void __init pmsav7_setup(void);
 #else
-
-static inline void adjust_lowmem_bounds_mpu(void) {}
-static inline void mpu_setup(void) {}
-
-#endif /* !CONFIG_ARM_MPU */
+static inline void pmsav7_adjust_lowmem_bounds(void) {};
+static inline void pmsav7_setup(void) {};
+#endif
 
 #endif /* __ASSEMBLY__ */
 
diff --git a/arch/arm/include/asm/v7m.h b/arch/arm/include/asm/v7m.h
index 634e771..aba49e0 100644
--- a/arch/arm/include/asm/v7m.h
+++ b/arch/arm/include/asm/v7m.h
@@ -64,9 +64,9 @@
 #define MPU_CTRL_ENABLE		1
 #define MPU_CTRL_PRIVDEFENA	(1 << 2)
 
-#define MPU_RNR			0x98
-#define MPU_RBAR		0x9c
-#define MPU_RASR		0xa0
+#define PMSAv7_RNR		0x98
+#define PMSAv7_RBAR		0x9c
+#define PMSAv7_RASR		0xa0
 
 /* Cache opeartions */
 #define	V7M_SCB_ICIALLU		0x250	/* I-cache invalidate all to PoU */
diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c
index f369ece..250a985 100644
--- a/arch/arm/kernel/asm-offsets.c
+++ b/arch/arm/kernel/asm-offsets.c
@@ -194,9 +194,9 @@ int main(void)
   DEFINE(MPU_RNG_INFO_USED,	offsetof(struct mpu_rgn_info, used));
 
   DEFINE(MPU_RNG_SIZE,		sizeof(struct mpu_rgn));
-  DEFINE(MPU_RGN_DRBAR,		offsetof(struct mpu_rgn, drbar));
-  DEFINE(MPU_RGN_DRSR,		offsetof(struct mpu_rgn, drsr));
-  DEFINE(MPU_RGN_DRACR,		offsetof(struct mpu_rgn, dracr));
+  DEFINE(MPU_RGN_DRBAR,	offsetof(struct mpu_rgn, drbar));
+  DEFINE(MPU_RGN_DRSR,	offsetof(struct mpu_rgn, drsr));
+  DEFINE(MPU_RGN_DRACR,	offsetof(struct mpu_rgn, dracr));
 #endif
   return 0; 
 }
diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
index 2e38f85..d5d5fc8 100644
--- a/arch/arm/kernel/head-nommu.S
+++ b/arch/arm/kernel/head-nommu.S
@@ -68,14 +68,6 @@ ENTRY(stext)
 	beq	__error_p				@ yes, error 'p'
 
 #ifdef CONFIG_ARM_MPU
-	/* Calculate the size of a region covering just the kernel */
-	ldr	r5, =PLAT_PHYS_OFFSET		@ Region start: PHYS_OFFSET
-	ldr     r6, =(_end)			@ Cover whole kernel
-	sub	r6, r6, r5			@ Minimum size of region to map
-	clz	r6, r6				@ Region size must be 2^N...
-	rsb	r6, r6, #31			@ ...so round up region size
-	lsl	r6, r6, #MPU_RSR_SZ		@ Put size in right field
-	orr	r6, r6, #(1 << MPU_RSR_EN)	@ Set region enabled bit
 	bl	__setup_mpu
 #endif
 
@@ -110,8 +102,6 @@ ENTRY(secondary_startup)
 	ldr	r7, __secondary_data
 
 #ifdef CONFIG_ARM_MPU
-	/* Use MPU region info supplied by __cpu_up */
-	ldr	r6, [r7]			@ get secondary_data.mpu_rgn_info
 	bl      __secondary_setup_mpu		@ Initialize the MPU
 #endif
 
@@ -184,7 +174,7 @@ ENDPROC(__after_proc_init)
 .endm
 
 /* Setup a single MPU region, either D or I side (D-side for unified) */
-.macro setup_region bar, acr, sr, side = MPU_DATA_SIDE, unused
+.macro setup_region bar, acr, sr, side = PMSAv7_DATA_SIDE, unused
 	mcr	p15, 0, \bar, c6, c1, (0 + \side)	@ I/DRBAR
 	mcr	p15, 0, \acr, c6, c1, (4 + \side)	@ I/DRACR
 	mcr	p15, 0, \sr, c6, c1, (2 + \side)		@ I/DRSR
@@ -192,14 +182,14 @@ ENDPROC(__after_proc_init)
 #else
 .macro set_region_nr tmp, rgnr, base
 	mov	\tmp, \rgnr
-	str     \tmp, [\base, #MPU_RNR]
+	str     \tmp, [\base, #PMSAv7_RNR]
 .endm
 
 .macro setup_region bar, acr, sr, unused, base
 	lsl     \acr, \acr, #16
 	orr     \acr, \acr, \sr
-	str     \bar, [\base, #MPU_RBAR]
-	str     \acr, [\base, #MPU_RASR]
+	str     \bar, [\base, #PMSAv7_RBAR]
+	str     \acr, [\base, #PMSAv7_RASR]
 .endm
 
 #endif
@@ -210,7 +200,7 @@ ENDPROC(__after_proc_init)
  * Region 2: Normal, Shared, cacheable for RAM. From PHYS_OFFSET, size from r6
  * Region 3: Normal, shared, inaccessible from PL0 to protect the vectors page
  *
- * r6: Value to be written to DRSR (and IRSR if required) for MPU_RAM_REGION
+ * r6: Value to be written to DRSR (and IRSR if required) for PMSAv7_RAM_REGION
 */
 
 ENTRY(__setup_mpu)
@@ -223,7 +213,20 @@ AR_CLASS(mrc	p15, 0, r0, c0, c1, 4)		@ Read ID_MMFR0
 M_CLASS(ldr	r0, [r12, 0x50])
 	and	r0, r0, #(MMFR0_PMSA)		@ PMSA field
 	teq	r0, #(MMFR0_PMSAv7)		@ PMSA v7
-	bxne	lr
+	beq	__setup_pmsa_v7
+
+	ret	lr
+ENDPROC(__setup_mpu)
+
+ENTRY(__setup_pmsa_v7)
+	/* Calculate the size of a region covering just the kernel */
+	ldr	r5, =PLAT_PHYS_OFFSET		@ Region start: PHYS_OFFSET
+	ldr     r6, =(_end)			@ Cover whole kernel
+	sub	r6, r6, r5			@ Minimum size of region to map
+	clz	r6, r6				@ Region size must be 2^N...
+	rsb	r6, r6, #31			@ ...so round up region size
+	lsl	r6, r6, #PMSAv7_RSR_SZ		@ Put size in right field
+	orr	r6, r6, #(1 << PMSAv7_RSR_EN)	@ Set region enabled bit
 
 	/* Determine whether the D/I-side memory map is unified. We set the
 	 * flags here and continue to use them for the rest of this function */
@@ -234,47 +237,47 @@ M_CLASS(ldr    r0, [r12, #MPU_TYPE])
 	tst	r0, #MPUIR_nU			@ MPUIR_nU = 0 for unified
 
 	/* Setup second region first to free up r6 */
-	set_region_nr r0, #MPU_RAM_REGION, r12
+	set_region_nr r0, #PMSAv7_RAM_REGION, r12
 	isb
 	/* Full access from PL0, PL1, shared for CONFIG_SMP, cacheable */
 	ldr	r0, =PLAT_PHYS_OFFSET		@ RAM starts at PHYS_OFFSET
-	ldr	r5,=(MPU_AP_PL1RW_PL0RW | MPU_RGN_NORMAL)
+	ldr	r5,=(PMSAv7_AP_PL1RW_PL0RW | PMSAv7_RGN_NORMAL)
 
-	setup_region r0, r5, r6, MPU_DATA_SIDE, r12	@ PHYS_OFFSET, shared, enabled
+	setup_region r0, r5, r6, PMSAv7_DATA_SIDE, r12	@ PHYS_OFFSET, shared, enabled
 	beq	1f					@ Memory-map not unified
-	setup_region r0, r5, r6, MPU_INSTR_SIDE, r12	@ PHYS_OFFSET, shared, enabled
+	setup_region r0, r5, r6, PMSAv7_INSTR_SIDE, r12	@ PHYS_OFFSET, shared, enabled
 1:	isb
 
 	/* First/background region */
-	set_region_nr r0, #MPU_BG_REGION, r12
+	set_region_nr r0, #PMSAv7_BG_REGION, r12
 	isb
 	/* Execute Never,  strongly ordered, inaccessible to PL0, rw PL1  */
 	mov	r0, #0				@ BG region starts at 0x0
-	ldr	r5,=(MPU_ACR_XN | MPU_RGN_STRONGLY_ORDERED | MPU_AP_PL1RW_PL0NA)
-	mov	r6, #MPU_RSR_ALL_MEM		@ 4GB region, enabled
+	ldr	r5,=(PMSAv7_ACR_XN | PMSAv7_RGN_STRONGLY_ORDERED | PMSAv7_AP_PL1RW_PL0NA)
+	mov	r6, #PMSAv7_RSR_ALL_MEM		@ 4GB region, enabled
 
-	setup_region r0, r5, r6, MPU_DATA_SIDE, r12	@ 0x0, BG region, enabled
+	setup_region r0, r5, r6, PMSAv7_DATA_SIDE, r12	@ 0x0, BG region, enabled
 	beq	2f					@ Memory-map not unified
-	setup_region r0, r5, r6, MPU_INSTR_SIDE r12	@ 0x0, BG region, enabled
+	setup_region r0, r5, r6, PMSAv7_INSTR_SIDE r12	@ 0x0, BG region, enabled
 2:	isb
 
 #ifdef CONFIG_XIP_KERNEL
-	set_region_nr r0, #MPU_ROM_REGION, r12
+	set_region_nr r0, #PMSAv7_ROM_REGION, r12
 	isb
 
-	ldr	r5,=(MPU_AP_PL1RO_PL0NA | MPU_RGN_NORMAL)
+	ldr	r5,=(PMSAv7_AP_PL1RO_PL0NA | PMSAv7_RGN_NORMAL)
 
 	ldr	r0, =CONFIG_XIP_PHYS_ADDR		@ ROM start
 	ldr     r6, =(_exiprom)				@ ROM end
 	sub	r6, r6, r0				@ Minimum size of region to map
 	clz	r6, r6					@ Region size must be 2^N...
 	rsb	r6, r6, #31				@ ...so round up region size
-	lsl	r6, r6, #MPU_RSR_SZ			@ Put size in right field
-	orr	r6, r6, #(1 << MPU_RSR_EN)		@ Set region enabled bit
+	lsl	r6, r6, #PMSAv7_RSR_SZ			@ Put size in right field
+	orr	r6, r6, #(1 << PMSAv7_RSR_EN)		@ Set region enabled bit
 
-	setup_region r0, r5, r6, MPU_DATA_SIDE, r12	@ XIP_PHYS_ADDR, shared, enabled
+	setup_region r0, r5, r6, PMSAv7_DATA_SIDE, r12	@ XIP_PHYS_ADDR, shared, enabled
 	beq	3f					@ Memory-map not unified
-	setup_region r0, r5, r6, MPU_INSTR_SIDE, r12	@ XIP_PHYS_ADDR, shared, enabled
+	setup_region r0, r5, r6, PMSAv7_INSTR_SIDE, r12	@ XIP_PHYS_ADDR, shared, enabled
 3:	isb
 #endif
 
@@ -291,7 +294,7 @@ M_CLASS(str	r0, [r12, #MPU_CTRL])
 	isb
 
 	ret	lr
-ENDPROC(__setup_mpu)
+ENDPROC(__setup_pmsa_v7)
 
 #ifdef CONFIG_SMP
 /*
@@ -299,12 +302,21 @@ ENDPROC(__setup_mpu)
  */
 
 ENTRY(__secondary_setup_mpu)
+	/* Use MPU region info supplied by __cpu_up */
+	ldr	r6, [r7]			@ get secondary_data.mpu_rgn_info
+
 	/* Probe for v7 PMSA compliance */
 	mrc	p15, 0, r0, c0, c1, 4		@ Read ID_MMFR0
 	and	r0, r0, #(MMFR0_PMSA)		@ PMSA field
 	teq	r0, #(MMFR0_PMSAv7)		@ PMSA v7
-	bne	__error_p
+	beq	__secondary_setup_pmsa_v7
+	b	__error_p
+ENDPROC(__secondary_setup_mpu)
 
+/*
+ * r6: pointer at mpu_rgn_info
+ */
+ENTRY(__secondary_setup_pmsa_v7)
 	/* Determine whether the D/I-side memory map is unified. We set the
 	 * flags here and continue to use them for the rest of this function */
 	mrc	p15, 0, r0, c0, c0, 4		@ MPUIR
@@ -328,9 +340,9 @@ ENTRY(__secondary_setup_mpu)
 	ldr	r6, [r3, #MPU_RGN_DRSR]
 	ldr	r5, [r3, #MPU_RGN_DRACR]
 
-	setup_region r0, r5, r6, MPU_DATA_SIDE
+	setup_region r0, r5, r6, PMSAv7_DATA_SIDE
 	beq	2f
-	setup_region r0, r5, r6, MPU_INSTR_SIDE
+	setup_region r0, r5, r6, PMSAv7_INSTR_SIDE
 2:	isb
 
 	mrc	p15, 0, r0, c0, c0, 4		@ Reevaluate the MPUIR
@@ -345,7 +357,7 @@ ENTRY(__secondary_setup_mpu)
 	isb
 
 	ret	lr
-ENDPROC(__secondary_setup_mpu)
+ENDPROC(__secondary_setup_pmsa_v7)
 
 #endif /* CONFIG_SMP */
 #endif /* CONFIG_ARM_MPU */
diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c
index 7c08796..edbaa47 100644
--- a/arch/arm/mm/nommu.c
+++ b/arch/arm/mm/nommu.c
@@ -99,6 +99,32 @@ void __init arm_mm_memblock_reserve(void)
 	memblock_reserve(0, 1);
 }
 
+static void __init adjust_lowmem_bounds_mpu(void)
+{
+	unsigned long pmsa = read_cpuid_ext(CPUID_EXT_MMFR0) & MMFR0_PMSA;
+
+	switch (pmsa) {
+	case MMFR0_PMSAv7:
+		pmsav7_adjust_lowmem_bounds();
+		break;
+	default:
+		break;
+	}
+}
+
+static void __init mpu_setup(void)
+{
+	unsigned long pmsa = read_cpuid_ext(CPUID_EXT_MMFR0) & MMFR0_PMSA;
+
+	switch (pmsa) {
+	case MMFR0_PMSAv7:
+		pmsav7_setup();
+		break;
+	default:
+		break;
+	}
+}
+
 void __init adjust_lowmem_bounds(void)
 {
 	phys_addr_t end;
diff --git a/arch/arm/mm/pmsa-v7.c b/arch/arm/mm/pmsa-v7.c
index e2853bf..699fa2e 100644
--- a/arch/arm/mm/pmsa-v7.c
+++ b/arch/arm/mm/pmsa-v7.c
@@ -102,7 +102,7 @@ static inline u32 irbar_read(void)
 
 static inline void rgnr_write(u32 v)
 {
-	writel_relaxed(v, BASEADDR_V7M_SCB + MPU_RNR);
+	writel_relaxed(v, BASEADDR_V7M_SCB + PMSAv7_RNR);
 }
 
 /* Data-side / unified region attributes */
@@ -110,28 +110,28 @@ static inline void rgnr_write(u32 v)
 /* Region access control register */
 static inline void dracr_write(u32 v)
 {
-	u32 rsr = readl_relaxed(BASEADDR_V7M_SCB + MPU_RASR) & GENMASK(15, 0);
+	u32 rsr = readl_relaxed(BASEADDR_V7M_SCB + PMSAv7_RASR) & GENMASK(15, 0);
 
-	writel_relaxed((v << 16) | rsr, BASEADDR_V7M_SCB + MPU_RASR);
+	writel_relaxed((v << 16) | rsr, BASEADDR_V7M_SCB + PMSAv7_RASR);
 }
 
 /* Region size register */
 static inline void drsr_write(u32 v)
 {
-	u32 racr = readl_relaxed(BASEADDR_V7M_SCB + MPU_RASR) & GENMASK(31, 16);
+	u32 racr = readl_relaxed(BASEADDR_V7M_SCB + PMSAv7_RASR) & GENMASK(31, 16);
 
-	writel_relaxed(v | racr, BASEADDR_V7M_SCB + MPU_RASR);
+	writel_relaxed(v | racr, BASEADDR_V7M_SCB + PMSAv7_RASR);
 }
 
 /* Region base address register */
 static inline void drbar_write(u32 v)
 {
-	writel_relaxed(v, BASEADDR_V7M_SCB + MPU_RBAR);
+	writel_relaxed(v, BASEADDR_V7M_SCB + PMSAv7_RBAR);
 }
 
 static inline u32 drbar_read(void)
 {
-	return readl_relaxed(BASEADDR_V7M_SCB + MPU_RBAR);
+	return readl_relaxed(BASEADDR_V7M_SCB + PMSAv7_RBAR);
 }
 
 /* ARMv7-M only supports a unified MPU, so I-side operations are nop */
@@ -143,11 +143,6 @@ static inline unsigned long irbar_read(void) {return 0;}
 
 #endif
 
-static int __init mpu_present(void)
-{
-	return ((read_cpuid_ext(CPUID_EXT_MMFR0) & MMFR0_PMSA) == MMFR0_PMSAv7);
-}
-
 static bool __init try_split_region(phys_addr_t base, phys_addr_t size, struct region *region)
 {
 	unsigned long  subreg, bslots, sslots;
@@ -161,7 +156,7 @@ static bool __init try_split_region(phys_addr_t base, phys_addr_t size, struct r
 
 	bdiff = base - abase;
 	sdiff = p2size - asize;
-	subreg = p2size / MPU_NR_SUBREGS;
+	subreg = p2size / PMSAv7_NR_SUBREGS;
 
 	if ((bdiff % subreg) || (sdiff % subreg))
 		return false;
@@ -172,17 +167,17 @@ static bool __init try_split_region(phys_addr_t base, phys_addr_t size, struct r
 	if (bslots || sslots) {
 		int i;
 
-		if (subreg < MPU_MIN_SUBREG_SIZE)
+		if (subreg < PMSAv7_MIN_SUBREG_SIZE)
 			return false;
 
-		if (bslots + sslots > MPU_NR_SUBREGS)
+		if (bslots + sslots > PMSAv7_NR_SUBREGS)
 			return false;
 
 		for (i = 0; i < bslots; i++)
 			_set_bit(i, &region->subreg);
 
 		for (i = 1; i <= sslots; i++)
-			_set_bit(MPU_NR_SUBREGS - i, &region->subreg);
+			_set_bit(PMSAv7_NR_SUBREGS - i, &region->subreg);
 	}
 
 	region->base = abase;
@@ -233,7 +228,7 @@ static int __init allocate_region(phys_addr_t base, phys_addr_t size,
 }
 
 /* MPU initialisation functions */
-void __init adjust_lowmem_bounds_mpu(void)
+void __init pmsav7_adjust_lowmem_bounds(void)
 {
 	phys_addr_t  specified_mem_size = 0, total_mem_size = 0;
 	struct memblock_region *reg;
@@ -243,10 +238,7 @@ void __init adjust_lowmem_bounds_mpu(void)
 	unsigned int mem_max_regions;
 	int num, i;
 
-	if (!mpu_present())
-		return;
-
-	/* Free-up MPU_PROBE_REGION */
+	/* Free-up PMSAv7_PROBE_REGION */
 	mpu_min_region_order = __mpu_min_region_order();
 
 	/* How many regions are supported */
@@ -301,12 +293,12 @@ void __init adjust_lowmem_bounds_mpu(void)
 	num = allocate_region(mem_start, specified_mem_size, mem_max_regions, mem);
 
 	for (i = 0; i < num; i++) {
-		unsigned long  subreg = mem[i].size / MPU_NR_SUBREGS;
+		unsigned long  subreg = mem[i].size / PMSAv7_NR_SUBREGS;
 
 		total_mem_size += mem[i].size - subreg * hweight_long(mem[i].subreg);
 
 		pr_debug("MPU: base %pa size %pa disable subregions: %*pbl\n",
-			 &mem[i].base, &mem[i].size, MPU_NR_SUBREGS, &mem[i].subreg);
+			 &mem[i].base, &mem[i].size, PMSAv7_NR_SUBREGS, &mem[i].subreg);
 	}
 
 	if (total_mem_size != specified_mem_size) {
@@ -349,7 +341,7 @@ static int __init __mpu_min_region_order(void)
 	u32 drbar_result, irbar_result;
 
 	/* We've kept a region free for this probing */
-	rgnr_write(MPU_PROBE_REGION);
+	rgnr_write(PMSAv7_PROBE_REGION);
 	isb();
 	/*
 	 * As per ARM ARM, write 0xFFFFFFFC to DRBAR to find the minimum
@@ -388,8 +380,8 @@ static int __init mpu_setup_region(unsigned int number, phys_addr_t start,
 		return -ENOMEM;
 
 	/* Writing N to bits 5:1 (RSR_SZ)  specifies region size 2^N+1 */
-	size_data = ((size_order - 1) << MPU_RSR_SZ) | 1 << MPU_RSR_EN;
-	size_data |= subregions << MPU_RSR_SD;
+	size_data = ((size_order - 1) << PMSAv7_RSR_SZ) | 1 << PMSAv7_RSR_EN;
+	size_data |= subregions << PMSAv7_RSR_SD;
 
 	if (need_flush)
 		flush_cache_all();
@@ -424,18 +416,15 @@ static int __init mpu_setup_region(unsigned int number, phys_addr_t start,
 /*
 * Set up default MPU regions, doing nothing if there is no MPU
 */
-void __init mpu_setup(void)
+void __init pmsav7_setup(void)
 {
 	int i, region = 0, err = 0;
 
-	if (!mpu_present())
-		return;
-
 	/* Setup MPU (order is important) */
 
 	/* Background */
 	err |= mpu_setup_region(region++, 0, 32,
-				MPU_ACR_XN | MPU_RGN_STRONGLY_ORDERED | MPU_AP_PL1RW_PL0RW,
+				PMSAv7_ACR_XN | PMSAv7_RGN_STRONGLY_ORDERED | PMSAv7_AP_PL1RW_PL0RW,
 				0, false);
 
 #ifdef CONFIG_XIP_KERNEL
@@ -448,13 +437,13 @@ void __init mpu_setup(void)
                  * with BG region (which is uncachable), thus we need
                  * to clean and invalidate cache.
 		 */
-		bool need_flush = region == MPU_RAM_REGION;
+		bool need_flush = region == PMSAv7_RAM_REGION;
 
 		if (!xip[i].size)
 			continue;
 
 		err |= mpu_setup_region(region++, xip[i].base, ilog2(xip[i].size),
-					MPU_AP_PL1RO_PL0NA | MPU_RGN_NORMAL,
+					PMSAv7_AP_PL1RO_PL0NA | PMSAv7_RGN_NORMAL,
 					xip[i].subreg, need_flush);
 	}
 #endif
@@ -465,14 +454,14 @@ void __init mpu_setup(void)
 			continue;
 
 		err |= mpu_setup_region(region++, mem[i].base, ilog2(mem[i].size),
-					MPU_AP_PL1RW_PL0RW | MPU_RGN_NORMAL,
+					PMSAv7_AP_PL1RW_PL0RW | PMSAv7_RGN_NORMAL,
 					mem[i].subreg, false);
 	}
 
 	/* Vectors */
 #ifndef CONFIG_CPU_V7M
 	err |= mpu_setup_region(region++, vectors_base, ilog2(2 * PAGE_SIZE),
-				MPU_AP_PL1RW_PL0NA | MPU_RGN_NORMAL,
+				PMSAv7_AP_PL1RW_PL0NA | PMSAv7_RGN_NORMAL,
 				0, false);
 #endif
 	if (err) {