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-rw-r--r--arch/xtensa/include/asm/traps.h44
-rw-r--r--arch/xtensa/kernel/entry.S60
-rw-r--r--arch/xtensa/kernel/head.S9
-rw-r--r--arch/xtensa/kernel/setup.c6
-rw-r--r--arch/xtensa/kernel/signal.c2
-rw-r--r--arch/xtensa/platforms/xtfpga/setup.c12
6 files changed, 95 insertions, 38 deletions
diff --git a/arch/xtensa/include/asm/traps.h b/arch/xtensa/include/asm/traps.h
index 917488a0ab00..f2faa58f9a43 100644
--- a/arch/xtensa/include/asm/traps.h
+++ b/arch/xtensa/include/asm/traps.h
@@ -22,25 +22,37 @@ extern void do_unhandled(struct pt_regs *regs, unsigned long exccause);
static inline void spill_registers(void)
{
-
+#if XCHAL_NUM_AREGS > 16
__asm__ __volatile__ (
- "movi a14, "__stringify((1 << PS_EXCM_BIT) | LOCKLEVEL)"\n\t"
- "mov a12, a0\n\t"
- "rsr a13, sar\n\t"
- "xsr a14, ps\n\t"
- "movi a0, _spill_registers\n\t"
- "rsync\n\t"
- "callx0 a0\n\t"
- "mov a0, a12\n\t"
- "wsr a13, sar\n\t"
- "wsr a14, ps\n\t"
- : :
-#if defined(CONFIG_FRAME_POINTER)
- : "a2", "a3", "a4", "a11", "a12", "a13", "a14", "a15",
+ " call12 1f\n"
+ " _j 2f\n"
+ " retw\n"
+ " .align 4\n"
+ "1:\n"
+ " _entry a1, 48\n"
+ " addi a12, a0, 3\n"
+#if XCHAL_NUM_AREGS > 32
+ " .rept (" __stringify(XCHAL_NUM_AREGS) " - 32) / 12\n"
+ " _entry a1, 48\n"
+ " mov a12, a0\n"
+ " .endr\n"
+#endif
+ " _entry a1, 48\n"
+#if XCHAL_NUM_AREGS % 12 == 0
+ " mov a8, a8\n"
+#elif XCHAL_NUM_AREGS % 12 == 4
+ " mov a12, a12\n"
+#elif XCHAL_NUM_AREGS % 12 == 8
+ " mov a4, a4\n"
+#endif
+ " retw\n"
+ "2:\n"
+ : : : "a12", "a13", "memory");
#else
- : "a2", "a3", "a4", "a7", "a11", "a12", "a13", "a14", "a15",
+ __asm__ __volatile__ (
+ " mov a12, a12\n"
+ : : : "memory");
#endif
- "memory");
}
#endif /* _XTENSA_TRAPS_H */
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
index 5082507d5631..aa7f9add7d77 100644
--- a/arch/xtensa/kernel/entry.S
+++ b/arch/xtensa/kernel/entry.S
@@ -1912,6 +1912,43 @@ ENTRY(system_call)
ENDPROC(system_call)
+/*
+ * Spill live registers on the kernel stack macro.
+ *
+ * Entry condition: ps.woe is set, ps.excm is cleared
+ * Exit condition: windowstart has single bit set
+ * May clobber: a12, a13
+ */
+ .macro spill_registers_kernel
+
+#if XCHAL_NUM_AREGS > 16
+ call12 1f
+ _j 2f
+ retw
+ .align 4
+1:
+ _entry a1, 48
+ addi a12, a0, 3
+#if XCHAL_NUM_AREGS > 32
+ .rept (XCHAL_NUM_AREGS - 32) / 12
+ _entry a1, 48
+ mov a12, a0
+ .endr
+#endif
+ _entry a1, 48
+#if XCHAL_NUM_AREGS % 12 == 0
+ mov a8, a8
+#elif XCHAL_NUM_AREGS % 12 == 4
+ mov a12, a12
+#elif XCHAL_NUM_AREGS % 12 == 8
+ mov a4, a4
+#endif
+ retw
+2:
+#else
+ mov a12, a12
+#endif
+ .endm
/*
* Task switch.
@@ -1924,21 +1961,20 @@ ENTRY(_switch_to)
entry a1, 16
- mov a12, a2 # preserve 'prev' (a2)
- mov a13, a3 # and 'next' (a3)
+ mov a10, a2 # preserve 'prev' (a2)
+ mov a11, a3 # and 'next' (a3)
l32i a4, a2, TASK_THREAD_INFO
l32i a5, a3, TASK_THREAD_INFO
- save_xtregs_user a4 a6 a8 a9 a10 a11 THREAD_XTREGS_USER
+ save_xtregs_user a4 a6 a8 a9 a12 a13 THREAD_XTREGS_USER
- s32i a0, a12, THREAD_RA # save return address
- s32i a1, a12, THREAD_SP # save stack pointer
+ s32i a0, a10, THREAD_RA # save return address
+ s32i a1, a10, THREAD_SP # save stack pointer
/* Disable ints while we manipulate the stack pointer. */
- movi a14, (1 << PS_EXCM_BIT) | LOCKLEVEL
- xsr a14, ps
+ rsil a14, LOCKLEVEL
rsr a3, excsave1
rsync
s32i a3, a3, EXC_TABLE_FIXUP /* enter critical section */
@@ -1953,7 +1989,7 @@ ENTRY(_switch_to)
/* Flush register file. */
- call0 _spill_registers # destroys a3, a4, and SAR
+ spill_registers_kernel
/* Set kernel stack (and leave critical section)
* Note: It's save to set it here. The stack will not be overwritten
@@ -1969,13 +2005,13 @@ ENTRY(_switch_to)
/* restore context of the task 'next' */
- l32i a0, a13, THREAD_RA # restore return address
- l32i a1, a13, THREAD_SP # restore stack pointer
+ l32i a0, a11, THREAD_RA # restore return address
+ l32i a1, a11, THREAD_SP # restore stack pointer
- load_xtregs_user a5 a6 a8 a9 a10 a11 THREAD_XTREGS_USER
+ load_xtregs_user a5 a6 a8 a9 a12 a13 THREAD_XTREGS_USER
wsr a14, ps
- mov a2, a12 # return 'prev'
+ mov a2, a10 # return 'prev'
rsync
retw
diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S
index ef12c0e6fa25..7d740ebbe198 100644
--- a/arch/xtensa/kernel/head.S
+++ b/arch/xtensa/kernel/head.S
@@ -68,6 +68,15 @@ _SetupMMU:
#ifdef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
initialize_mmu
+#if defined(CONFIG_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
+ rsr a2, excsave1
+ movi a3, 0x08000000
+ bgeu a2, a3, 1f
+ movi a3, 0xd0000000
+ add a2, a2, a3
+ wsr a2, excsave1
+1:
+#endif
#endif
.end no-absolute-literals
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 6dd25ecde3f5..14c6c3a6f04b 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -152,8 +152,8 @@ static int __init parse_tag_initrd(const bp_tag_t* tag)
{
meminfo_t* mi;
mi = (meminfo_t*)(tag->data);
- initrd_start = (void*)(mi->start);
- initrd_end = (void*)(mi->end);
+ initrd_start = __va(mi->start);
+ initrd_end = __va(mi->end);
return 0;
}
@@ -164,7 +164,7 @@ __tagtable(BP_TAG_INITRD, parse_tag_initrd);
static int __init parse_tag_fdt(const bp_tag_t *tag)
{
- dtb_start = (void *)(tag->data[0]);
+ dtb_start = __va(tag->data[0]);
return 0;
}
diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
index 718eca1850bd..98b67d5f1514 100644
--- a/arch/xtensa/kernel/signal.c
+++ b/arch/xtensa/kernel/signal.c
@@ -341,7 +341,7 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sp = regs->areg[1];
- if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! on_sig_stack(sp)) {
+ if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && sas_ss_flags(sp) == 0) {
sp = current->sas_ss_sp + current->sas_ss_size;
}
diff --git a/arch/xtensa/platforms/xtfpga/setup.c b/arch/xtensa/platforms/xtfpga/setup.c
index 96ef8eeb064e..8a95204cbdae 100644
--- a/arch/xtensa/platforms/xtfpga/setup.c
+++ b/arch/xtensa/platforms/xtfpga/setup.c
@@ -195,7 +195,7 @@ void platform_calibrate_ccount(void)
* Ethernet -- OpenCores Ethernet MAC (ethoc driver)
*/
-static struct resource ethoc_res[] __initdata = {
+static struct resource ethoc_res[] = {
[0] = { /* register space */
.start = OETH_REGS_PADDR,
.end = OETH_REGS_PADDR + OETH_REGS_SIZE - 1,
@@ -213,7 +213,7 @@ static struct resource ethoc_res[] __initdata = {
},
};
-static struct ethoc_platform_data ethoc_pdata __initdata = {
+static struct ethoc_platform_data ethoc_pdata = {
/*
* The MAC address for these boards is 00:50:c2:13:6f:xx.
* The last byte (here as zero) is read from the DIP switches on the
@@ -223,7 +223,7 @@ static struct ethoc_platform_data ethoc_pdata __initdata = {
.phy_id = -1,
};
-static struct platform_device ethoc_device __initdata = {
+static struct platform_device ethoc_device = {
.name = "ethoc",
.id = -1,
.num_resources = ARRAY_SIZE(ethoc_res),
@@ -237,13 +237,13 @@ static struct platform_device ethoc_device __initdata = {
* UART
*/
-static struct resource serial_resource __initdata = {
+static struct resource serial_resource = {
.start = DUART16552_PADDR,
.end = DUART16552_PADDR + 0x1f,
.flags = IORESOURCE_MEM,
};
-static struct plat_serial8250_port serial_platform_data[] __initdata = {
+static struct plat_serial8250_port serial_platform_data[] = {
[0] = {
.mapbase = DUART16552_PADDR,
.irq = DUART16552_INTNUM,
@@ -256,7 +256,7 @@ static struct plat_serial8250_port serial_platform_data[] __initdata = {
{ },
};
-static struct platform_device xtavnet_uart __initdata = {
+static struct platform_device xtavnet_uart = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-27 16:58:45 +0000