[07/11] riscv: mm: Expose all page table bits to assembly code

Commit Message

Samuel Holland Nov. 2, 2024, 12:08 a.m. UTC

pgtable-32.h and pgtable-64.h are not usable by assembly code, so move
all page table field definitions to pgtable-bits.h.

Signed-off-by: Samuel Holland <[e-mail]>
---

 arch/riscv/include/asm/pgtable-32.h   | 11 -------
 arch/riscv/include/asm/pgtable-64.h   | 30 -------------------
 arch/riscv/include/asm/pgtable-bits.h | 42 +++++++++++++++++++++++++--
 3 files changed, 40 insertions(+), 43 deletions(-)

Patch

diff --git a/arch/riscv/include/asm/pgtable-32.h b/arch/riscv/include/asm/pgtable-32.h
index b422a15fb464..ba50b65b434b 100644
--- a/arch/riscv/include/asm/pgtable-32.h
+++ b/arch/riscv/include/asm/pgtable-32.h
@@ -17,17 +17,6 @@ 
 
 #define MAX_POSSIBLE_PHYSMEM_BITS 34
 
-/*
- * rv32 PTE format:
- * | XLEN-1  10 | 9             8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
- *       PFN      reserved for SW   D   A   G   U   X   W   R   V
- */
-#define _PAGE_PFN_MASK  GENMASK(31, 10)
-
-#define _PAGE_NOCACHE		0
-#define _PAGE_IO		0
-#define _PAGE_MTMASK		0
-
 #define ALT_FIXUP_MT(_val)
 #define ALT_UNFIX_MT(_val)
 
diff --git a/arch/riscv/include/asm/pgtable-64.h b/arch/riscv/include/asm/pgtable-64.h
index 4e8a32f035d7..174b6a5837c2 100644
--- a/arch/riscv/include/asm/pgtable-64.h
+++ b/arch/riscv/include/asm/pgtable-64.h
@@ -68,20 +68,6 @@  typedef struct {
 #define __pmd(x)        ((pmd_t) { (x) })
 #define PTRS_PER_PMD    (PAGE_SIZE / sizeof(pmd_t))
 
-/*
- * rv64 PTE format:
- * | 63 | 62 61 | 60 54 | 53  10 | 9             8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
- *   N      MT     RSV    PFN      reserved for SW   D   A   G   U   X   W   R   V
- */
-#define _PAGE_PFN_MASK  GENMASK(53, 10)
-
-/*
- * [63] Svnapot definitions:
- * 0 Svnapot disabled
- * 1 Svnapot enabled
- */
-#define _PAGE_NAPOT_SHIFT	63
-#define _PAGE_NAPOT		BIT(_PAGE_NAPOT_SHIFT)
 /*
  * Only 64KB (order 4) napot ptes supported.
  */
@@ -111,18 +97,6 @@  enum napot_cont_order {
 
 #ifdef CONFIG_RISCV_ISA_SVPBMT
 
-/*
- * [62:61] Svpbmt Memory Type definitions:
- *
- *  00 - PMA    Normal Cacheable, No change to implied PMA memory type
- *  01 - NC     Non-cacheable, idempotent, weakly-ordered Main Memory
- *  10 - IO     Non-cacheable, non-idempotent, strongly-ordered I/O memory
- *  11 - Rsvd   Reserved for future standard use
- */
-#define _PAGE_NOCACHE		(1UL << 61)
-#define _PAGE_IO		(2UL << 61)
-#define _PAGE_MTMASK		(3UL << 61)
-
 /*
  * [63:59] T-Head Memory Type definitions:
  * bit[63] SO - Strong Order
@@ -182,10 +156,6 @@  enum napot_cont_order {
 
 #else
 
-#define _PAGE_NOCACHE		0
-#define _PAGE_IO		0
-#define _PAGE_MTMASK		0
-
 #define ALT_FIXUP_MT(_val)
 #define ALT_UNFIX_MT(_val)
 
diff --git a/arch/riscv/include/asm/pgtable-bits.h b/arch/riscv/include/asm/pgtable-bits.h
index a8f5205cea54..96710d4c1817 100644
--- a/arch/riscv/include/asm/pgtable-bits.h
+++ b/arch/riscv/include/asm/pgtable-bits.h
@@ -6,6 +6,16 @@ 
 #ifndef _ASM_RISCV_PGTABLE_BITS_H
 #define _ASM_RISCV_PGTABLE_BITS_H
 
+/*
+ * rv32 PTE format:
+ * | XLEN-1  10 | 9             8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
+ *       PFN      reserved for SW   D   A   G   U   X   W   R   V
+ *
+ * rv64 PTE format:
+ * | 63 | 62 61 | 60 54 | 53 10 | 9             8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
+ *   N      MT     RSV     PFN    reserved for SW   D   A   G   U   X   W   R   V
+ */
+
 #define _PAGE_ACCESSED_OFFSET 6
 
 #define _PAGE_PRESENT   (1 << 0)
@@ -22,6 +32,36 @@ 
 #define _PAGE_DEVMAP    (1 << 9)    /* RSW, devmap */
 #define _PAGE_TABLE     _PAGE_PRESENT
 
+#define _PAGE_PFN_SHIFT		10
+#ifdef CONFIG_64BIT
+#define _PAGE_PFN_MASK		GENMASK(53, 10)
+#else
+#define _PAGE_PFN_MASK		GENMASK(31, 10)
+#endif /* CONFIG_64BIT */
+
+#ifdef CONFIG_RISCV_ISA_SVPBMT
+/*
+ * [62:61] Svpbmt Memory Type definitions:
+ *
+ *  00 - PMA    Normal Cacheable, No change to implied PMA memory type
+ *  01 - NC     Non-cacheable, idempotent, weakly-ordered Main Memory
+ *  10 - IO     Non-cacheable, non-idempotent, strongly-ordered I/O memory
+ *  11 - Rsvd   Reserved for future standard use
+ */
+#define _PAGE_NOCACHE		(UL(1) << 61)
+#define _PAGE_IO		(UL(2) << 61)
+#define _PAGE_MTMASK		(UL(3) << 61)
+#else
+#define _PAGE_NOCACHE		0
+#define _PAGE_IO		0
+#define _PAGE_MTMASK		0
+#endif /* CONFIG_RISCV_ISA_SVPBMT */
+
+#ifdef CONFIG_RISCV_ISA_SVNAPOT
+#define _PAGE_NAPOT_SHIFT	63
+#define _PAGE_NAPOT		BIT(_PAGE_NAPOT_SHIFT)
+#endif /* CONFIG_RISCV_ISA_SVNAPOT */
+
 /*
  * _PAGE_PROT_NONE is set on not-present pages (and ignored by the hardware) to
  * distinguish them from swapped out pages
@@ -31,8 +71,6 @@ 
 /* Used for swap PTEs only. */
 #define _PAGE_SWP_EXCLUSIVE _PAGE_ACCESSED
 
-#define _PAGE_PFN_SHIFT 10
-
 /*
  * when all of R/W/X are zero, the PTE is a pointer to the next level
  * of the page table; otherwise, it is a leaf PTE.