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-rw-r--r--arch/arc/boot/dts/angel4.dts2
-rw-r--r--arch/arc/include/asm/cache.h4
-rw-r--r--arch/arc/include/asm/processor.h2
-rw-r--r--arch/arc/include/uapi/asm/ptrace.h1
-rw-r--r--arch/arc/kernel/ctx_sw_asm.S2
-rw-r--r--arch/arc/kernel/devtree.c2
-rw-r--r--arch/arc/kernel/head.S7
-rw-r--r--arch/arc/kernel/perf_event.c7
-rw-r--r--arch/arc/kernel/ptrace.c4
-rw-r--r--arch/arc/kernel/smp.c15
-rw-r--r--arch/arc/kernel/vmlinux.lds.S2
-rw-r--r--arch/arc/mm/cache_arc700.c25
-rw-r--r--arch/arc/plat-arcfpga/Kconfig7
-rw-r--r--arch/arc/plat-arcfpga/platform.c97
14 files changed, 54 insertions, 123 deletions
diff --git a/arch/arc/boot/dts/angel4.dts b/arch/arc/boot/dts/angel4.dts
index 5bb2fdaca02..6b57475967a 100644
--- a/arch/arc/boot/dts/angel4.dts
+++ b/arch/arc/boot/dts/angel4.dts
@@ -17,7 +17,7 @@
interrupt-parent = <&intc>;
chosen {
- bootargs = "console=ttyARC0,115200n8 earlyprintk=ttyARC0";
+ bootargs = "earlycon=arc_uart,mmio32,0xc0fc1000,115200n8 console=ttyARC0,115200n8";
};
aliases {
diff --git a/arch/arc/include/asm/cache.h b/arch/arc/include/asm/cache.h
index c1d3d2da119..b3c750979aa 100644
--- a/arch/arc/include/asm/cache.h
+++ b/arch/arc/include/asm/cache.h
@@ -60,7 +60,7 @@ extern void read_decode_cache_bcr(void);
#define ARC_REG_IC_IVIC 0x10
#define ARC_REG_IC_CTRL 0x11
#define ARC_REG_IC_IVIL 0x19
-#if defined(CONFIG_ARC_MMU_V3) || defined (CONFIG_ARC_MMU_V4)
+#if defined(CONFIG_ARC_MMU_V3)
#define ARC_REG_IC_PTAG 0x1E
#endif
@@ -74,7 +74,7 @@ extern void read_decode_cache_bcr(void);
#define ARC_REG_DC_IVDL 0x4A
#define ARC_REG_DC_FLSH 0x4B
#define ARC_REG_DC_FLDL 0x4C
-#if defined(CONFIG_ARC_MMU_V3) || defined (CONFIG_ARC_MMU_V4)
+#if defined(CONFIG_ARC_MMU_V3)
#define ARC_REG_DC_PTAG 0x5C
#endif
diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h
index d99f9b37cd1..82588f3ba77 100644
--- a/arch/arc/include/asm/processor.h
+++ b/arch/arc/include/asm/processor.h
@@ -62,6 +62,8 @@ unsigned long thread_saved_pc(struct task_struct *t);
#define cpu_relax() do { } while (0)
#endif
+#define cpu_relax_lowlatency() cpu_relax()
+
#define copy_segments(tsk, mm) do { } while (0)
#define release_segments(mm) do { } while (0)
diff --git a/arch/arc/include/uapi/asm/ptrace.h b/arch/arc/include/uapi/asm/ptrace.h
index 2618cc13ba7..76a7739aab1 100644
--- a/arch/arc/include/uapi/asm/ptrace.h
+++ b/arch/arc/include/uapi/asm/ptrace.h
@@ -11,6 +11,7 @@
#ifndef _UAPI__ASM_ARC_PTRACE_H
#define _UAPI__ASM_ARC_PTRACE_H
+#define PTRACE_GET_THREAD_AREA 25
#ifndef __ASSEMBLY__
/*
diff --git a/arch/arc/kernel/ctx_sw_asm.S b/arch/arc/kernel/ctx_sw_asm.S
index 2ff0347a2fd..e248594097e 100644
--- a/arch/arc/kernel/ctx_sw_asm.S
+++ b/arch/arc/kernel/ctx_sw_asm.S
@@ -10,9 +10,9 @@
* -This is the more "natural" hand written assembler
*/
+#include <linux/linkage.h>
#include <asm/entry.h> /* For the SAVE_* macros */
#include <asm/asm-offsets.h>
-#include <asm/linkage.h>
#define KSP_WORD_OFF ((TASK_THREAD + THREAD_KSP) / 4)
diff --git a/arch/arc/kernel/devtree.c b/arch/arc/kernel/devtree.c
index 0b3ef4025d8..fffdb5e41b2 100644
--- a/arch/arc/kernel/devtree.c
+++ b/arch/arc/kernel/devtree.c
@@ -41,7 +41,7 @@ const struct machine_desc * __init setup_machine_fdt(void *dt)
{
const struct machine_desc *mdesc;
unsigned long dt_root;
- void *clk;
+ const void *clk;
int len;
if (!early_init_dt_scan(dt))
diff --git a/arch/arc/kernel/head.S b/arch/arc/kernel/head.S
index 07a58f2d307..4d2481bd8b9 100644
--- a/arch/arc/kernel/head.S
+++ b/arch/arc/kernel/head.S
@@ -77,10 +77,11 @@ stext:
; Clear BSS before updating any globals
; XXX: use ZOL here
mov r5, __bss_start
- mov r6, __bss_stop
+ sub r6, __bss_stop, r5
+ lsr.f lp_count, r6, 2
+ lpnz 1f
+ st.ab 0, [r5, 4]
1:
- st.ab 0, [r5,4]
- brlt r5, r6, 1b
; Uboot - kernel ABI
; r0 = [0] No uboot interaction, [1] cmdline in r2, [2] DTB in r2
diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c
index 63177e4cb66..b9a5685a990 100644
--- a/arch/arc/kernel/perf_event.c
+++ b/arch/arc/kernel/perf_event.c
@@ -99,10 +99,6 @@ static int arc_pmu_event_init(struct perf_event *event)
struct hw_perf_event *hwc = &event->hw;
int ret;
- /* ARC 700 PMU does not support sampling events */
- if (is_sampling_event(event))
- return -ENOENT;
-
switch (event->attr.type) {
case PERF_TYPE_HARDWARE:
if (event->attr.config >= PERF_COUNT_HW_MAX)
@@ -298,6 +294,9 @@ static int arc_pmu_device_probe(struct platform_device *pdev)
.read = arc_pmu_read,
};
+ /* ARC 700 PMU does not support sampling events */
+ arc_pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
+
ret = perf_pmu_register(&arc_pmu->pmu, pdev->name, PERF_TYPE_RAW);
return ret;
diff --git a/arch/arc/kernel/ptrace.c b/arch/arc/kernel/ptrace.c
index 5d76706139d..13b3ffb27a3 100644
--- a/arch/arc/kernel/ptrace.c
+++ b/arch/arc/kernel/ptrace.c
@@ -146,6 +146,10 @@ long arch_ptrace(struct task_struct *child, long request,
pr_debug("REQ=%ld: ADDR =0x%lx, DATA=0x%lx)\n", request, addr, data);
switch (request) {
+ case PTRACE_GET_THREAD_AREA:
+ ret = put_user(task_thread_info(child)->thr_ptr,
+ (unsigned long __user *)data);
+ break;
default:
ret = ptrace_request(child, request, addr, data);
break;
diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c
index cf90b6f4d3e..c802bb50060 100644
--- a/arch/arc/kernel/smp.c
+++ b/arch/arc/kernel/smp.c
@@ -337,8 +337,19 @@ irqreturn_t do_IPI(int irq, void *dev_id)
* API called by platform code to hookup arch-common ISR to their IPI IRQ
*/
static DEFINE_PER_CPU(int, ipi_dev);
+
+static struct irqaction arc_ipi_irq = {
+ .name = "IPI Interrupt",
+ .flags = IRQF_PERCPU,
+ .handler = do_IPI,
+};
+
int smp_ipi_irq_setup(int cpu, int irq)
{
- int *dev_id = &per_cpu(ipi_dev, smp_processor_id());
- return request_percpu_irq(irq, do_IPI, "IPI Interrupt", dev_id);
+ if (!cpu)
+ return setup_irq(irq, &arc_ipi_irq);
+ else
+ arch_unmask_irq(irq);
+
+ return 0;
}
diff --git a/arch/arc/kernel/vmlinux.lds.S b/arch/arc/kernel/vmlinux.lds.S
index 2555f5886af..dd35bde39f6 100644
--- a/arch/arc/kernel/vmlinux.lds.S
+++ b/arch/arc/kernel/vmlinux.lds.S
@@ -116,7 +116,7 @@ SECTIONS
_edata = .;
- BSS_SECTION(0, 0, 0)
+ BSS_SECTION(4, 4, 4)
#ifdef CONFIG_ARC_DW2_UNWIND
. = ALIGN(PAGE_SIZE);
diff --git a/arch/arc/mm/cache_arc700.c b/arch/arc/mm/cache_arc700.c
index 1f676c4794e..353b202c37c 100644
--- a/arch/arc/mm/cache_arc700.c
+++ b/arch/arc/mm/cache_arc700.c
@@ -389,7 +389,7 @@ static inline void __dc_line_op(unsigned long paddr, unsigned long vaddr,
/***********************************************************
* Machine specific helper for per line I-Cache invalidate.
*/
-static void __ic_line_inv_vaddr(unsigned long paddr, unsigned long vaddr,
+static void __ic_line_inv_vaddr_local(unsigned long paddr, unsigned long vaddr,
unsigned long sz)
{
unsigned long flags;
@@ -405,6 +405,23 @@ static inline void __ic_entire_inv(void)
read_aux_reg(ARC_REG_IC_CTRL); /* blocks */
}
+struct ic_line_inv_vaddr_ipi {
+ unsigned long paddr, vaddr;
+ int sz;
+};
+
+static void __ic_line_inv_vaddr_helper(void *info)
+{
+ struct ic_line_inv_vaddr_ipi *ic_inv = (struct ic_line_inv_vaddr_ipi*) info;
+ __ic_line_inv_vaddr_local(ic_inv->paddr, ic_inv->vaddr, ic_inv->sz);
+}
+
+static void __ic_line_inv_vaddr(unsigned long paddr, unsigned long vaddr,
+ unsigned long sz)
+{
+ struct ic_line_inv_vaddr_ipi ic_inv = { paddr, vaddr , sz};
+ on_each_cpu(__ic_line_inv_vaddr_helper, &ic_inv, 1);
+}
#else
#define __ic_entire_inv()
@@ -553,12 +570,8 @@ void flush_icache_range(unsigned long kstart, unsigned long kend)
*/
void __sync_icache_dcache(unsigned long paddr, unsigned long vaddr, int len)
{
- unsigned long flags;
-
- local_irq_save(flags);
- __ic_line_inv_vaddr(paddr, vaddr, len);
__dc_line_op(paddr, vaddr, len, OP_FLUSH_N_INV);
- local_irq_restore(flags);
+ __ic_line_inv_vaddr(paddr, vaddr, len);
}
/* wrapper to compile time eliminate alignment checks in flush loop */
diff --git a/arch/arc/plat-arcfpga/Kconfig b/arch/arc/plat-arcfpga/Kconfig
index e27bb5cc3c1..b9f34cf55ac 100644
--- a/arch/arc/plat-arcfpga/Kconfig
+++ b/arch/arc/plat-arcfpga/Kconfig
@@ -41,11 +41,4 @@ config ISS_SMP_EXTN
-XTL (To enable CPU start/stop/set-PC for another CPU)
It doesn't provide coherent Caches and/or Atomic Ops (LLOCK/SCOND)
-config ARC_SERIAL_BAUD
- int "UART Baud rate"
- default "115200"
- depends on SERIAL_ARC || SERIAL_ARC_CONSOLE
- help
- Baud rate for the ARC UART
-
endif
diff --git a/arch/arc/plat-arcfpga/platform.c b/arch/arc/plat-arcfpga/platform.c
index 61c7e599738..b8d0d456627 100644
--- a/arch/arc/plat-arcfpga/platform.c
+++ b/arch/arc/plat-arcfpga/platform.c
@@ -22,115 +22,22 @@
#include <plat/smp.h>
#include <plat/irq.h>
-/*----------------------- Platform Devices -----------------------------*/
-
-#if IS_ENABLED(CONFIG_SERIAL_ARC)
-static unsigned long arc_uart_info[] = {
- 0, /* uart->is_emulated (runtime @running_on_hw) */
- 0, /* uart->port.uartclk */
- 0, /* uart->baud */
- 0
-};
-
-#if defined(CONFIG_SERIAL_ARC_CONSOLE)
-/*
- * static platform data - but only for early serial
- * TBD: derive this from a special DT node
- */
-static struct resource arc_uart0_res[] = {
- {
- .start = UART0_BASE,
- .end = UART0_BASE + 0xFF,
- .flags = IORESOURCE_MEM,
- },
- {
- .start = UART0_IRQ,
- .end = UART0_IRQ,
- .flags = IORESOURCE_IRQ,
- },
-};
-
-static struct platform_device arc_uart0_dev = {
- .name = "arc-uart",
- .id = 0,
- .num_resources = ARRAY_SIZE(arc_uart0_res),
- .resource = arc_uart0_res,
- .dev = {
- .platform_data = &arc_uart_info,
- },
-};
-
-static struct platform_device *fpga_early_devs[] __initdata = {
- &arc_uart0_dev,
-};
-#endif /* CONFIG_SERIAL_ARC_CONSOLE */
-
-static void arc_fpga_serial_init(void)
-{
- /* To let driver workaround ISS bug: baudh Reg can't be set to 0 */
- arc_uart_info[0] = !running_on_hw;
-
- arc_uart_info[1] = arc_get_core_freq();
-
- arc_uart_info[2] = CONFIG_ARC_SERIAL_BAUD;
-
-#if defined(CONFIG_SERIAL_ARC_CONSOLE)
- early_platform_add_devices(fpga_early_devs,
- ARRAY_SIZE(fpga_early_devs));
-
- /*
- * ARC console driver registers (build time) as an early platform driver
- * of class "earlyprintk". However it needs explicit cmdline toggle
- * "earlyprintk=ttyARC0" to be successfuly runtime registered.
- * Otherwise the early probe below fails to find the driver
- */
- early_platform_driver_probe("earlyprintk", 1, 0);
-
- /*
- * This is to make sure that arc uart would be preferred console
- * despite one/more of following:
- * -command line lacked "console=ttyARC0" or
- * -CONFIG_VT_CONSOLE was enabled (for no reason whatsoever)
- * Note that this needs to be done after above early console is reg,
- * otherwise the early console never gets a chance to run.
- */
- add_preferred_console("ttyARC", 0, "115200");
-#endif /* CONFIG_SERIAL_ARC_CONSOLE */
-}
-#else /* !IS_ENABLED(CONFIG_SERIAL_ARC) */
-static void arc_fpga_serial_init(void)
-{
-}
-#endif
-
static void __init plat_fpga_early_init(void)
{
pr_info("[plat-arcfpga]: registering early dev resources\n");
- arc_fpga_serial_init();
-
#ifdef CONFIG_ISS_SMP_EXTN
iss_model_init_early_smp();
#endif
}
-static struct of_dev_auxdata plat_auxdata_lookup[] __initdata = {
-#if IS_ENABLED(CONFIG_SERIAL_ARC)
- OF_DEV_AUXDATA("snps,arc-uart", UART0_BASE, "arc-uart", arc_uart_info),
-#endif
- {}
-};
-
static void __init plat_fpga_populate_dev(void)
{
- pr_info("[plat-arcfpga]: registering device resources\n");
-
/*
* Traverses flattened DeviceTree - registering platform devices
- * complete with their resources
+ * (if any) complete with their resources
*/
- of_platform_populate(NULL, of_default_bus_match_table,
- plat_auxdata_lookup, NULL);
+ of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
/*----------------------- Machine Descriptions ------------------------------
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-05 22:24:22 +0000