From: Christophe Leroy <christophe.leroy@c-s.fr> To: Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au>, j.neuschaefer@gmx.net Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v1 07/13] powerpc/mm/32s: add setibat() clearibat() and update_bats() Date: Thu, 29 Nov 2018 19:00:24 +0000 (UTC) [thread overview] Message-ID: <43cde6255c890f944700accf8769e73786794342.1543517818.git.christophe.leroy@c-s.fr> (raw) In-Reply-To: <cover.1543517818.git.christophe.leroy@c-s.fr> setibat() and clearibat() allows to manipulate IBATs independently of DBATs. update_bats() allows to update bats after init. This is done with MMU off. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> --- arch/powerpc/include/asm/book3s/32/mmu-hash.h | 2 ++ arch/powerpc/kernel/head_32.S | 35 +++++++++++++++++++++++++++ arch/powerpc/mm/ppc_mmu_32.c | 32 ++++++++++++++++++++++++ 3 files changed, 69 insertions(+) diff --git a/arch/powerpc/include/asm/book3s/32/mmu-hash.h b/arch/powerpc/include/asm/book3s/32/mmu-hash.h index e38c91388c40..b4ccb832d4fb 100644 --- a/arch/powerpc/include/asm/book3s/32/mmu-hash.h +++ b/arch/powerpc/include/asm/book3s/32/mmu-hash.h @@ -83,6 +83,8 @@ typedef struct { unsigned long vdso_base; } mm_context_t; +void update_bats(void); + #endif /* !__ASSEMBLY__ */ /* We happily ignore the smaller BATs on 601, we don't actually use diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S index d1c39b5ccfd6..0f4c72ebb151 100644 --- a/arch/powerpc/kernel/head_32.S +++ b/arch/powerpc/kernel/head_32.S @@ -1101,6 +1101,41 @@ BEGIN_MMU_FTR_SECTION END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS) blr +_ENTRY(update_bats) + lis r4, 1f@h + ori r4, r4, 1f@l + tophys(r4, r4) + mfmsr r6 + mflr r7 + li r3, MSR_KERNEL & ~(MSR_IR | MSR_DR) + rlwinm r0, r6, 0, ~MSR_RI + rlwinm r0, r0, 0, ~MSR_EE + mtmsr r0 + mtspr SPRN_SRR0, r4 + mtspr SPRN_SRR1, r3 + SYNC + RFI +1: bl clear_bats + lis r3, BATS@ha + addi r3, r3, BATS@l + tophys(r3, r3) + LOAD_BAT(0, r3, r4, r5) + LOAD_BAT(1, r3, r4, r5) + LOAD_BAT(2, r3, r4, r5) + LOAD_BAT(3, r3, r4, r5) +BEGIN_MMU_FTR_SECTION + LOAD_BAT(4, r3, r4, r5) + LOAD_BAT(5, r3, r4, r5) + LOAD_BAT(6, r3, r4, r5) + LOAD_BAT(7, r3, r4, r5) +END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS) + li r3, MSR_KERNEL & ~(MSR_IR | MSR_DR | MSR_RI) + mtmsr r3 + mtspr SPRN_SRR0, r7 + mtspr SPRN_SRR1, r6 + SYNC + RFI + flush_tlbs: lis r10, 0x40 1: addic. r10, r10, -0x1000 diff --git a/arch/powerpc/mm/ppc_mmu_32.c b/arch/powerpc/mm/ppc_mmu_32.c index 1078095d9407..58dd71686707 100644 --- a/arch/powerpc/mm/ppc_mmu_32.c +++ b/arch/powerpc/mm/ppc_mmu_32.c @@ -105,6 +105,38 @@ static unsigned int block_size(unsigned long base, unsigned long top) return min3(max_size, 1U << base_shift, 1U << block_shift); } +/* + * Set up one of the IBAT (block address translation) register pairs. + * The parameters are not checked; in particular size must be a power + * of 2 between 128k and 256M. + * Only for 603+ ... + */ +static void setibat(int index, unsigned long virt, phys_addr_t phys, + unsigned int size, pgprot_t prot) +{ + unsigned int bl = (size >> 17) - 1; + int wimgxpp; + struct ppc_bat *bat = BATS[index]; + unsigned long flags = pgprot_val(prot); + + if (!cpu_has_feature(CPU_FTR_NEED_COHERENT)) + flags &= ~_PAGE_COHERENT; + + wimgxpp = (flags & _PAGE_COHERENT) | (_PAGE_EXEC ? BPP_RX : BPP_XX); + bat[0].batu = virt | (bl << 2) | 2; /* Vs=1, Vp=0 */ + bat[0].batl = BAT_PHYS_ADDR(phys) | wimgxpp; + if (flags & _PAGE_USER) + bat[0].batu |= 1; /* Vp = 1 */ +} + +static void clearibat(int index) +{ + struct ppc_bat *bat = BATS[index]; + + bat[0].batu = 0; + bat[0].batl = 0; +} + unsigned long __init mmu_mapin_ram(unsigned long base, unsigned long top) { int idx; -- 2.13.3
WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@c-s.fr> To: Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au>, j.neuschaefer@gmx.net Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 07/13] powerpc/mm/32s: add setibat() clearibat() and update_bats() Date: Thu, 29 Nov 2018 19:00:24 +0000 (UTC) [thread overview] Message-ID: <43cde6255c890f944700accf8769e73786794342.1543517818.git.christophe.leroy@c-s.fr> (raw) In-Reply-To: <cover.1543517818.git.christophe.leroy@c-s.fr> setibat() and clearibat() allows to manipulate IBATs independently of DBATs. update_bats() allows to update bats after init. This is done with MMU off. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> --- arch/powerpc/include/asm/book3s/32/mmu-hash.h | 2 ++ arch/powerpc/kernel/head_32.S | 35 +++++++++++++++++++++++++++ arch/powerpc/mm/ppc_mmu_32.c | 32 ++++++++++++++++++++++++ 3 files changed, 69 insertions(+) diff --git a/arch/powerpc/include/asm/book3s/32/mmu-hash.h b/arch/powerpc/include/asm/book3s/32/mmu-hash.h index e38c91388c40..b4ccb832d4fb 100644 --- a/arch/powerpc/include/asm/book3s/32/mmu-hash.h +++ b/arch/powerpc/include/asm/book3s/32/mmu-hash.h @@ -83,6 +83,8 @@ typedef struct { unsigned long vdso_base; } mm_context_t; +void update_bats(void); + #endif /* !__ASSEMBLY__ */ /* We happily ignore the smaller BATs on 601, we don't actually use diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S index d1c39b5ccfd6..0f4c72ebb151 100644 --- a/arch/powerpc/kernel/head_32.S +++ b/arch/powerpc/kernel/head_32.S @@ -1101,6 +1101,41 @@ BEGIN_MMU_FTR_SECTION END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS) blr +_ENTRY(update_bats) + lis r4, 1f@h + ori r4, r4, 1f@l + tophys(r4, r4) + mfmsr r6 + mflr r7 + li r3, MSR_KERNEL & ~(MSR_IR | MSR_DR) + rlwinm r0, r6, 0, ~MSR_RI + rlwinm r0, r0, 0, ~MSR_EE + mtmsr r0 + mtspr SPRN_SRR0, r4 + mtspr SPRN_SRR1, r3 + SYNC + RFI +1: bl clear_bats + lis r3, BATS@ha + addi r3, r3, BATS@l + tophys(r3, r3) + LOAD_BAT(0, r3, r4, r5) + LOAD_BAT(1, r3, r4, r5) + LOAD_BAT(2, r3, r4, r5) + LOAD_BAT(3, r3, r4, r5) +BEGIN_MMU_FTR_SECTION + LOAD_BAT(4, r3, r4, r5) + LOAD_BAT(5, r3, r4, r5) + LOAD_BAT(6, r3, r4, r5) + LOAD_BAT(7, r3, r4, r5) +END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS) + li r3, MSR_KERNEL & ~(MSR_IR | MSR_DR | MSR_RI) + mtmsr r3 + mtspr SPRN_SRR0, r7 + mtspr SPRN_SRR1, r6 + SYNC + RFI + flush_tlbs: lis r10, 0x40 1: addic. r10, r10, -0x1000 diff --git a/arch/powerpc/mm/ppc_mmu_32.c b/arch/powerpc/mm/ppc_mmu_32.c index 1078095d9407..58dd71686707 100644 --- a/arch/powerpc/mm/ppc_mmu_32.c +++ b/arch/powerpc/mm/ppc_mmu_32.c @@ -105,6 +105,38 @@ static unsigned int block_size(unsigned long base, unsigned long top) return min3(max_size, 1U << base_shift, 1U << block_shift); } +/* + * Set up one of the IBAT (block address translation) register pairs. + * The parameters are not checked; in particular size must be a power + * of 2 between 128k and 256M. + * Only for 603+ ... + */ +static void setibat(int index, unsigned long virt, phys_addr_t phys, + unsigned int size, pgprot_t prot) +{ + unsigned int bl = (size >> 17) - 1; + int wimgxpp; + struct ppc_bat *bat = BATS[index]; + unsigned long flags = pgprot_val(prot); + + if (!cpu_has_feature(CPU_FTR_NEED_COHERENT)) + flags &= ~_PAGE_COHERENT; + + wimgxpp = (flags & _PAGE_COHERENT) | (_PAGE_EXEC ? BPP_RX : BPP_XX); + bat[0].batu = virt | (bl << 2) | 2; /* Vs=1, Vp=0 */ + bat[0].batl = BAT_PHYS_ADDR(phys) | wimgxpp; + if (flags & _PAGE_USER) + bat[0].batu |= 1; /* Vp = 1 */ +} + +static void clearibat(int index) +{ + struct ppc_bat *bat = BATS[index]; + + bat[0].batu = 0; + bat[0].batl = 0; +} + unsigned long __init mmu_mapin_ram(unsigned long base, unsigned long top) { int idx; -- 2.13.3
next prev parent reply other threads:[~2018-11-29 19:00 UTC|newest] Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-11-29 19:00 [PATCH v1 00/13] powerpc/32s: Use BATs for STRICT_KERNEL_RWX Christophe Leroy 2018-11-29 19:00 ` Christophe Leroy 2018-11-29 19:00 ` [PATCH v1 01/13] powerpc/mm: add exec protection on powerpc 603 Christophe Leroy 2018-11-29 19:00 ` Christophe Leroy 2018-11-29 19:00 ` [PATCH v1 02/13] powerpc/mm/32: add base address to mmu_mapin_ram() Christophe Leroy 2018-11-29 19:00 ` Christophe Leroy 2018-11-29 19:00 ` [PATCH v1 03/13] powerpc/mm/32s: rework mmu_mapin_ram() Christophe Leroy 2018-11-29 19:00 ` Christophe Leroy 2018-12-03 21:55 ` Jonathan Neuschäfer 2018-12-03 21:55 ` Jonathan Neuschäfer 2018-12-13 12:16 ` Christophe Leroy 2018-12-13 12:16 ` Christophe Leroy 2018-12-13 14:51 ` Christophe Leroy 2018-12-13 14:51 ` Christophe Leroy 2018-12-17 1:28 ` Jonathan Neuschäfer 2018-12-17 1:28 ` Jonathan Neuschäfer 2018-12-17 9:29 ` Christophe Leroy 2018-12-17 9:29 ` Christophe Leroy 2018-12-18 3:05 ` Jonathan Neuschäfer 2018-12-18 3:05 ` Jonathan Neuschäfer 2018-12-18 9:18 ` Christophe Leroy 2018-12-18 9:18 ` Christophe Leroy 2018-12-18 14:07 ` Jonathan Neuschäfer 2018-12-18 14:07 ` Jonathan Neuschäfer 2018-12-18 14:15 ` Christophe Leroy 2018-12-18 14:15 ` Christophe Leroy 2018-12-18 14:55 ` Christophe Leroy 2018-12-18 14:55 ` Christophe Leroy 2018-12-18 15:04 ` Christophe Leroy 2018-12-18 15:04 ` Christophe Leroy 2018-12-18 17:04 ` Jonathan Neuschäfer 2018-12-18 17:04 ` Jonathan Neuschäfer 2018-12-18 18:13 ` Christophe Leroy 2018-12-18 18:13 ` Christophe Leroy 2018-11-29 19:00 ` [PATCH v1 04/13] powerpc/mm/32s: use generic mmu_mapin_ram() for all blocks Christophe Leroy 2018-11-29 19:00 ` Christophe Leroy 2018-11-29 19:00 ` [PATCH v1 05/13] powerpc/wii: remove wii_mmu_mapin_mem2() Christophe Leroy 2018-11-29 19:00 ` Christophe Leroy 2018-11-29 19:00 ` [PATCH v1 06/13] powerpc/mm/32s: use _PAGE_EXEC in setbat() Christophe Leroy 2018-11-29 19:00 ` Christophe Leroy 2018-11-29 19:00 ` Christophe Leroy [this message] 2018-11-29 19:00 ` [PATCH v1 07/13] powerpc/mm/32s: add setibat() clearibat() and update_bats() Christophe Leroy 2018-11-29 19:00 ` [PATCH v1 08/13] powerpc/32: add helper to write into segment registers Christophe Leroy 2018-11-29 19:00 ` Christophe Leroy 2018-11-29 19:00 ` [PATCH v1 09/13] powerpc/mmu: add is_strict_kernel_rwx() helper Christophe Leroy 2018-11-29 19:00 ` Christophe Leroy 2018-11-29 19:00 ` [PATCH v1 10/13] powerpc/kconfig: define PAGE_SHIFT inside Kconfig Christophe Leroy 2018-11-29 19:00 ` Christophe Leroy 2018-11-29 19:00 ` [PATCH v1 11/13] powerpc/kconfig: define CONFIG_DATA_SHIFT and CONFIG_ETEXT_SHIFT Christophe Leroy 2018-11-29 19:00 ` Christophe Leroy 2018-11-29 19:00 ` [PATCH v1 12/13] powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX Christophe Leroy 2018-11-29 19:00 ` Christophe Leroy 2018-11-29 19:00 ` [PATCH v1 13/13] powerpc/kconfig: make _etext and data areas alignment configurable on Book3s 32 Christophe Leroy 2018-11-29 19:00 ` Christophe Leroy
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