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List: kvm-ppc
Subject: [kvm-unit-tests PATCH 09/14] powerpc/ppc64: adapt arm's setup
From: Andrew Jones <drjones () redhat ! com>
Date: 2015-08-03 14:41:26
Message-ID: 1438612891-3718-10-git-send-email-drjones () redhat ! com
[Download RAW message or body]
Copy arm's setup code (also DT based) over to powerpc, adapting
it a bit. Also bring over arm's setup selftest, giving powerpc
its first test.
Signed-off-by: Andrew Jones <drjones@redhat.com>
---
lib/powerpc/asm/setup.h | 27 ++++++++++++++++
lib/powerpc/setup.c | 82 +++++++++++++++++++++++++++++++++++++++++++++++++
lib/ppc64/asm/setup.h | 1 +
powerpc/cstart64.S | 9 ++++++
powerpc/selftest.c | 64 ++++++++++++++++++++++++++++++++++++--
5 files changed, 180 insertions(+), 3 deletions(-)
create mode 100644 lib/powerpc/asm/setup.h
create mode 100644 lib/ppc64/asm/setup.h
diff --git a/lib/powerpc/asm/setup.h b/lib/powerpc/asm/setup.h
new file mode 100644
index 0000000000000..745226a8cf067
--- /dev/null
+++ b/lib/powerpc/asm/setup.h
@@ -0,0 +1,27 @@
+#ifndef _ASMPOWERPC_SETUP_H_
+#define _ASMPOWERPC_SETUP_H_
+/*
+ * Copyright (C) 2015, Red Hat Inc, Andrew Jones <drjones@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.
+ */
+#include <libcflat.h>
+
+#define NR_CPUS 8 /* arbitrarily set for now */
+extern u32 cpus[NR_CPUS];
+extern int nr_cpus;
+
+extern phys_addr_t __physical_start, __physical_end;
+
+#define PHYSICAL_START (__physical_start)
+#define PHYSICAL_END (__physical_end)
+
+#ifdef __powerpc64__
+#define L1_CACHE_SHIFT 7
+#else
+#define L1_CACHE_SHIFT 5
+#endif
+#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
+#define SMP_CACHE_BYTES L1_CACHE_BYTES
+
+#endif /* _ASMPOWERPC_SETUP_H_ */
diff --git a/lib/powerpc/setup.c b/lib/powerpc/setup.c
index e69de29bb2d1d..1794d1f39066a 100644
--- a/lib/powerpc/setup.c
+++ b/lib/powerpc/setup.c
@@ -0,0 +1,82 @@
+/*
+ * Initialize machine setup information and I/O.
+ *
+ * After running setup() unit tests may query how many cpus they have
+ * (nr_cpus), how much memory they have (PHYSICAL_END - PHYSICAL_START),
+ * may use dynamic memory allocation (malloc, etc.), printf, and exit.
+ * Finally, argc and argv are also ready to be passed to main().
+ *
+ * Copyright (C) 2015, Red Hat Inc, Andrew Jones <drjones@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.
+ */
+#include <libcflat.h>
+#include <libfdt/libfdt.h>
+#include <devicetree.h>
+#include <alloc.h>
+#include <asm/setup.h>
+#include <asm/page.h>
+
+extern unsigned long stacktop;
+extern void io_init(void);
+extern void setup_args(const char *args);
+
+u32 cpus[NR_CPUS] = { [0 ... NR_CPUS-1] = (~0U) };
+int nr_cpus;
+
+phys_addr_t __physical_start, __physical_end;
+
+static void cpu_set(int fdtnode __unused, u32 regval, void *info __unused)
+{
+ int cpu = nr_cpus++;
+ assert(cpu < NR_CPUS);
+ cpus[cpu] = regval;
+}
+
+static void cpu_init(void)
+{
+ nr_cpus = 0;
+ assert(dt_for_each_cpu_node(cpu_set, NULL) == 0);
+}
+
+static void mem_init(phys_addr_t freemem_start)
+{
+ /* we only expect one membank to be defined in the DT */
+ struct dt_pbus_reg regs[1];
+ phys_addr_t mem_start, mem_end;
+
+ assert(dt_get_memory_params(regs, 1));
+
+ mem_start = regs[0].addr;
+ mem_end = mem_start + regs[0].size;
+
+// assert(!(mem_start & ~PHYS_MASK) && !((mem_end-1) & ~PHYS_MASK));
+ assert(freemem_start >= mem_start && freemem_start < mem_end);
+
+ __physical_start = mem_start; /* PHYSICAL_START */
+ __physical_end = mem_end; /* PHYSICAL_END */
+
+ phys_alloc_init(freemem_start, mem_end - freemem_start);
+ phys_alloc_set_minimum_alignment(SMP_CACHE_BYTES);
+}
+
+void setup(const void *fdt)
+{
+ const char *bootargs;
+ u32 fdt_size;
+
+ /*
+ * Move the fdt to just above the stack. The free memory
+ * then starts just after the fdt.
+ */
+ fdt_size = fdt_totalsize(fdt);
+ assert(fdt_move(fdt, &stacktop, fdt_size) == 0);
+ assert(dt_init(&stacktop) == 0);
+
+ mem_init(PAGE_ALIGN((unsigned long)&stacktop + fdt_size));
+ io_init();
+ cpu_init();
+
+ assert(dt_get_bootargs(&bootargs) == 0);
+ setup_args(bootargs);
+}
diff --git a/lib/ppc64/asm/setup.h b/lib/ppc64/asm/setup.h
new file mode 100644
index 0000000000000..20192985928a4
--- /dev/null
+++ b/lib/ppc64/asm/setup.h
@@ -0,0 +1 @@
+#include "../../powerpc/asm/setup.h"
diff --git a/powerpc/cstart64.S b/powerpc/cstart64.S
index d7c51cd352ee4..141d4563563d5 100644
--- a/powerpc/cstart64.S
+++ b/powerpc/cstart64.S
@@ -21,10 +21,19 @@
.section .init
+/*
+ * start is the entry point. r3 points to the DTB
+ */
.globl start
start:
LOAD_REG_IMMEDIATE(r1, stackptr)
LOAD_REG_IMMEDIATE(r2, tocptr)
+ bl .setup
+
+ /* run the test */
+ LOAD_REG_IMMEDIATE(r5, __argc)
+ LOAD_REG_IMMEDIATE(r4, __argv)
+ lwz r3, 0(r5)
bl .main
bl .exit
b halt
diff --git a/powerpc/selftest.c b/powerpc/selftest.c
index 2f2a5215dd55c..b1d5e73029f46 100644
--- a/powerpc/selftest.c
+++ b/powerpc/selftest.c
@@ -1,7 +1,65 @@
+/*
+ * Test the framework itself. These tests confirm that setup works.
+ *
+ * Copyright (C) 2015, Red Hat Inc, Andrew Jones <drjones@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.
+ */
#include <libcflat.h>
+#include <util.h>
+#include <alloc.h> /* phys_addr_t */
+#include <asm/setup.h>
-int main(void)
+static void check_setup(int argc, char **argv)
{
- printf("hello world\n");
- return 0;
+ int nr_tests = 0, i;
+ char *var;
+ long val;
+
+ for (i = 0; i < argc; ++i) {
+
+ var = parse_keyval(argv[i], &val);
+ if (!var)
+ continue;
+
+ report_prefix_push(var);
+
+ if (strcmp(var, "mem") == 0) {
+
+ phys_addr_t memsize = PHYSICAL_END - PHYSICAL_START;
+ phys_addr_t expected = ((phys_addr_t)val)*1024*1024;
+
+ report("size = %d MB", memsize == expected,
+ memsize/1024/1024);
+ ++nr_tests;
+
+ } else if (strcmp(var, "smp") == 0) {
+
+ report("nr_cpus = %d", nr_cpus == (int)val, nr_cpus);
+ ++nr_tests;
+ }
+
+ report_prefix_pop();
+ }
+
+ if (nr_tests < 2)
+ report_abort("missing input");
+}
+
+int main(int argc, char **argv)
+{
+ report_prefix_push("selftest");
+
+ if (argc < 1)
+ report_abort("no test specified");
+
+ report_prefix_push(argv[0]);
+
+ if (strcmp(argv[0], "setup") == 0) {
+
+ check_setup(argc-1, &argv[1]);
+
+ }
+
+ return report_summary();
}
--
2.4.3
--
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