Unverified Commit 7549cdf5 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Palmer Dabbelt
Browse files

riscv: rename sptbr to satp



satp is the name used by the current privileged spec 1.10, use it
instead of the old name.  The most recent release binutils release
(2.29) doesn't know about the satp name yet, so stick to the name from
the previous privileged ISA release and comment on the fact.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarPalmer Dabbelt <palmer@sifive.com>
parent 372def1f
......@@ -40,15 +40,15 @@
#define SR_SD _AC(0x8000000000000000, UL) /* FS/XS dirty */
#endif
/* SPTBR flags */
/* SATP flags */
#if __riscv_xlen == 32
#define SPTBR_PPN _AC(0x003FFFFF, UL)
#define SPTBR_MODE_32 _AC(0x80000000, UL)
#define SPTBR_MODE SPTBR_MODE_32
#define SATP_PPN _AC(0x003FFFFF, UL)
#define SATP_MODE_32 _AC(0x80000000, UL)
#define SATP_MODE SATP_MODE_32
#else
#define SPTBR_PPN _AC(0x00000FFFFFFFFFFF, UL)
#define SPTBR_MODE_39 _AC(0x8000000000000000, UL)
#define SPTBR_MODE SPTBR_MODE_39
#define SATP_PPN _AC(0x00000FFFFFFFFFFF, UL)
#define SATP_MODE_39 _AC(0x8000000000000000, UL)
#define SATP_MODE SATP_MODE_39
#endif
/* Interrupt Enable and Interrupt Pending flags */
......
......@@ -41,7 +41,12 @@ static inline void destroy_context(struct mm_struct *mm)
static inline void set_pgdir(pgd_t *pgd)
{
csr_write(sptbr, virt_to_pfn(pgd) | SPTBR_MODE);
/*
* Use the old spbtr name instead of using the current satp
* name to support binutils 2.29 which doesn't know about the
* privileged ISA 1.10 yet.
*/
csr_write(sptbr, virt_to_pfn(next->pgd) | SATP_MODE);
}
/*
......
......@@ -74,15 +74,15 @@ relocate:
sub a1, a1, a0
add ra, ra, a1
/* Point stvec to virtual address of intruction after sptbr write */
/* Point stvec to virtual address of intruction after satp write */
la a0, 1f
add a0, a0, a1
csrw stvec, a0
/* Compute sptbr for kernel page tables, but don't load it yet */
/* Compute satp for kernel page tables, but don't load it yet */
la a2, swapper_pg_dir
srl a2, a2, PAGE_SHIFT
li a1, SPTBR_MODE
li a1, SATP_MODE
or a2, a2, a1
/*
......
......@@ -239,6 +239,10 @@ vmalloc_fault:
* Do _not_ use "tsk->active_mm->pgd" here.
* We might be inside an interrupt in the middle
* of a task switch.
*
* Note: Use the old spbtr name instead of using the current
* satp name to support binutils 2.29 which doesn't know about
* the privileged ISA 1.10 yet.
*/
index = pgd_index(addr);
pgd = (pgd_t *)pfn_to_virt(csr_read(sptbr)) + index;
......
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment