1 files changed, 66 insertions, 157 deletions

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 9b38a2e5dd35..f33ff4163a51 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -43,11 +43,13 @@
 #include <asm/btext.h>
 #include <asm/sections.h>
 #include <asm/machdep.h>
-#include <asm/opal.h>
 #include <asm/asm-prototypes.h>
 
 #include <linux/linux_logo.h>
 
+/* All of prom_init bss lives here */
+#define __prombss __section(.bss.prominit)
+
 /*
  * Eventually bump that one up
  */
@@ -87,7 +89,7 @@
 #define OF_WORKAROUNDS	0
 #else
 #define OF_WORKAROUNDS	of_workarounds
-int of_workarounds;
+static int of_workarounds __prombss;
 #endif
 
 #define OF_WA_CLAIM	1	/* do phys/virt claim separately, then map */
@@ -148,29 +150,31 @@ extern void copy_and_flush(unsigned long dest, unsigned long src,
 			   unsigned long size, unsigned long offset);
 
 /* prom structure */
-static struct prom_t __initdata prom;
+static struct prom_t __prombss prom;
 
-static unsigned long prom_entry __initdata;
+static unsigned long __prombss prom_entry;
 
 #define PROM_SCRATCH_SIZE 256
 
-static char __initdata of_stdout_device[256];
-static char __initdata prom_scratch[PROM_SCRATCH_SIZE];
+static char __prombss of_stdout_device[256];
+static char __prombss prom_scratch[PROM_SCRATCH_SIZE];
 
-static unsigned long __initdata dt_header_start;
-static unsigned long __initdata dt_struct_start, dt_struct_end;
-static unsigned long __initdata dt_string_start, dt_string_end;
+static unsigned long __prombss dt_header_start;
+static unsigned long __prombss dt_struct_start, dt_struct_end;
+static unsigned long __prombss dt_string_start, dt_string_end;
 
-static unsigned long __initdata prom_initrd_start, prom_initrd_end;
+static unsigned long __prombss prom_initrd_start, prom_initrd_end;
 
 #ifdef CONFIG_PPC64
-static int __initdata prom_iommu_force_on;
-static int __initdata prom_iommu_off;
-static unsigned long __initdata prom_tce_alloc_start;
-static unsigned long __initdata prom_tce_alloc_end;
+static int __prombss prom_iommu_force_on;
+static int __prombss prom_iommu_off;
+static unsigned long __prombss prom_tce_alloc_start;
+static unsigned long __prombss prom_tce_alloc_end;
 #endif
 
-static bool prom_radix_disable __initdata = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT);
+#ifdef CONFIG_PPC_PSERIES
+static bool __prombss prom_radix_disable;
+#endif
 
 struct platform_support {
 	bool hash_mmu;
@@ -188,26 +192,25 @@ struct platform_support {
 #define PLATFORM_LPAR		0x0001
 #define PLATFORM_POWERMAC	0x0400
 #define PLATFORM_GENERIC	0x0500
-#define PLATFORM_OPAL		0x0600
 
-static int __initdata of_platform;
+static int __prombss of_platform;
 
-static char __initdata prom_cmd_line[COMMAND_LINE_SIZE];
+static char __prombss prom_cmd_line[COMMAND_LINE_SIZE];
 
-static unsigned long __initdata prom_memory_limit;
+static unsigned long __prombss prom_memory_limit;
 
-static unsigned long __initdata alloc_top;
-static unsigned long __initdata alloc_top_high;
-static unsigned long __initdata alloc_bottom;
-static unsigned long __initdata rmo_top;
-static unsigned long __initdata ram_top;
+static unsigned long __prombss alloc_top;
+static unsigned long __prombss alloc_top_high;
+static unsigned long __prombss alloc_bottom;
+static unsigned long __prombss rmo_top;
+static unsigned long __prombss ram_top;
 
-static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE];
-static int __initdata mem_reserve_cnt;
+static struct mem_map_entry __prombss mem_reserve_map[MEM_RESERVE_MAP_SIZE];
+static int __prombss mem_reserve_cnt;
 
-static cell_t __initdata regbuf[1024];
+static cell_t __prombss regbuf[1024];
 
-static bool rtas_has_query_cpu_stopped;
+static bool  __prombss rtas_has_query_cpu_stopped;
 
 
 /*
@@ -522,8 +525,8 @@ static void add_string(char **str, const char *q)
 
 static char *tohex(unsigned int x)
 {
-	static char digits[] = "0123456789abcdef";
-	static char result[9];
+	static const char digits[] __initconst = "0123456789abcdef";
+	static char result[9] __prombss;
 	int i;
 
 	result[8] = 0;
@@ -664,6 +667,8 @@ static void __init early_cmdline_parse(void)
 #endif
 	}
 
+#ifdef CONFIG_PPC_PSERIES
+	prom_radix_disable = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT);
 	opt = strstr(prom_cmd_line, "disable_radix");
 	if (opt) {
 		opt += 13;
@@ -679,9 +684,10 @@ static void __init early_cmdline_parse(void)
 	}
 	if (prom_radix_disable)
 		prom_debug("Radix disabled from cmdline\n");
+#endif /* CONFIG_PPC_PSERIES */
 }
 
-#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
+#ifdef CONFIG_PPC_PSERIES
 /*
  * The architecture vector has an array of PVR mask/value pairs,
  * followed by # option vectors - 1, followed by the option vectors.
@@ -782,7 +788,7 @@ struct ibm_arch_vec {
 	struct option_vector6 vec6;
 } __packed;
 
-struct ibm_arch_vec __cacheline_aligned ibm_architecture_vec = {
+static const struct ibm_arch_vec ibm_architecture_vec_template __initconst = {
 	.pvrs = {
 		{
 			.mask = cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */
@@ -920,9 +926,11 @@ struct ibm_arch_vec __cacheline_aligned ibm_architecture_vec = {
 	},
 };
 
+static struct ibm_arch_vec __prombss ibm_architecture_vec  ____cacheline_aligned;
+
 /* Old method - ELF header with PT_NOTE sections only works on BE */
 #ifdef __BIG_ENDIAN__
-static struct fake_elf {
+static const struct fake_elf {
 	Elf32_Ehdr	elfhdr;
 	Elf32_Phdr	phdr[2];
 	struct chrpnote {
@@ -955,7 +963,7 @@ static struct fake_elf {
 			u32	ignore_me;
 		} rpadesc;
 	} rpanote;
-} fake_elf = {
+} fake_elf __initconst = {
 	.elfhdr = {
 		.e_ident = { 0x7f, 'E', 'L', 'F',
 			     ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
@@ -1129,14 +1137,21 @@ static void __init prom_check_platform_support(void)
 	};
 	int prop_len = prom_getproplen(prom.chosen,
 				       "ibm,arch-vec-5-platform-support");
+
+	/* First copy the architecture vec template */
+	ibm_architecture_vec = ibm_architecture_vec_template;
+
 	if (prop_len > 1) {
 		int i;
-		u8 vec[prop_len];
+		u8 vec[8];
 		prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n",
 			   prop_len);
+		if (prop_len > sizeof(vec))
+			prom_printf("WARNING: ibm,arch-vec-5-platform-support longer than expected (len: %d)\n",
+				    prop_len);
 		prom_getprop(prom.chosen, "ibm,arch-vec-5-platform-support",
 			     &vec, sizeof(vec));
-		for (i = 0; i < prop_len; i += 2) {
+		for (i = 0; i < sizeof(vec); i += 2) {
 			prom_debug("%d: index = 0x%x val = 0x%x\n", i / 2
 								  , vec[i]
 								  , vec[i + 1]);
@@ -1225,7 +1240,7 @@ static void __init prom_send_capabilities(void)
 	}
 #endif /* __BIG_ENDIAN__ */
 }
-#endif /* #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */
+#endif /* CONFIG_PPC_PSERIES */
 
 /*
  * Memory allocation strategy... our layout is normally:
@@ -1562,88 +1577,6 @@ static void __init prom_close_stdin(void)
 	}
 }
 
-#ifdef CONFIG_PPC_POWERNV
-
-#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
-static u64 __initdata prom_opal_base;
-static u64 __initdata prom_opal_entry;
-#endif
-
-/*
- * Allocate room for and instantiate OPAL
- */
-static void __init prom_instantiate_opal(void)
-{
-	phandle opal_node;
-	ihandle opal_inst;
-	u64 base, entry;
-	u64 size = 0, align = 0x10000;
-	__be64 val64;
-	u32 rets[2];
-
-	prom_debug("prom_instantiate_opal: start...\n");
-
-	opal_node = call_prom("finddevice", 1, 1, ADDR("/ibm,opal"));
-	prom_debug("opal_node: %x\n", opal_node);
-	if (!PHANDLE_VALID(opal_node))
-		return;
-
-	val64 = 0;
-	prom_getprop(opal_node, "opal-runtime-size", &val64, sizeof(val64));
-	size = be64_to_cpu(val64);
-	if (size == 0)
-		return;
-	val64 = 0;
-	prom_getprop(opal_node, "opal-runtime-alignment", &val64,sizeof(val64));
-	align = be64_to_cpu(val64);
-
-	base = alloc_down(size, align, 0);
-	if (base == 0) {
-		prom_printf("OPAL allocation failed !\n");
-		return;
-	}
-
-	opal_inst = call_prom("open", 1, 1, ADDR("/ibm,opal"));
-	if (!IHANDLE_VALID(opal_inst)) {
-		prom_printf("opening opal package failed (%x)\n", opal_inst);
-		return;
-	}
-
-	prom_printf("instantiating opal at 0x%llx...", base);
-
-	if (call_prom_ret("call-method", 4, 3, rets,
-			  ADDR("load-opal-runtime"),
-			  opal_inst,
-			  base >> 32, base & 0xffffffff) != 0
-	    || (rets[0] == 0 && rets[1] == 0)) {
-		prom_printf(" failed\n");
-		return;
-	}
-	entry = (((u64)rets[0]) << 32) | rets[1];
-
-	prom_printf(" done\n");
-
-	reserve_mem(base, size);
-
-	prom_debug("opal base     = 0x%llx\n", base);
-	prom_debug("opal align    = 0x%llx\n", align);
-	prom_debug("opal entry    = 0x%llx\n", entry);
-	prom_debug("opal size     = 0x%llx\n", size);
-
-	prom_setprop(opal_node, "/ibm,opal", "opal-base-address",
-		     &base, sizeof(base));
-	prom_setprop(opal_node, "/ibm,opal", "opal-entry-address",
-		     &entry, sizeof(entry));
-
-#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
-	prom_opal_base = base;
-	prom_opal_entry = entry;
-#endif
-	prom_debug("prom_instantiate_opal: end...\n");
-}
-
-#endif /* CONFIG_PPC_POWERNV */
-
 /*
  * Allocate room for and instantiate RTAS
  */
@@ -2150,10 +2083,6 @@ static int __init prom_find_machine_type(void)
 		}
 	}
 #ifdef CONFIG_PPC64
-	/* Try to detect OPAL */
-	if (PHANDLE_VALID(call_prom("finddevice", 1, 1, ADDR("/ibm,opal"))))
-		return PLATFORM_OPAL;
-
 	/* Try to figure out if it's an IBM pSeries or any other
 	 * PAPR compliant platform. We assume it is if :
 	 *  - /device_type is "chrp" (please, do NOT use that for future
@@ -2202,7 +2131,7 @@ static void __init prom_check_displays(void)
 	ihandle ih;
 	int i;
 
-	static unsigned char default_colors[] = {
+	static const unsigned char default_colors[] __initconst = {
 		0x00, 0x00, 0x00,
 		0x00, 0x00, 0xaa,
 		0x00, 0xaa, 0x00,
@@ -2398,7 +2327,7 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
 	char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
 	unsigned long soff;
 	unsigned char *valp;
-	static char pname[MAX_PROPERTY_NAME];
+	static char pname[MAX_PROPERTY_NAME] __prombss;
 	int l, room, has_phandle = 0;
 
 	dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
@@ -2481,14 +2410,11 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
 			has_phandle = 1;
 	}
 
-	/* Add a "linux,phandle" property if no "phandle" property already
-	 * existed (can happen with OPAL)
-	 */
+	/* Add a "phandle" property if none already exist */
 	if (!has_phandle) {
-		soff = dt_find_string("linux,phandle");
+		soff = dt_find_string("phandle");
 		if (soff == 0)
-			prom_printf("WARNING: Can't find string index for"
-				    " <linux-phandle> node %s\n", path);
+			prom_printf("WARNING: Can't find string index for <phandle> node %s\n", path);
 		else {
 			dt_push_token(OF_DT_PROP, mem_start, mem_end);
 			dt_push_token(4, mem_start, mem_end);
@@ -2548,9 +2474,9 @@ static void __init flatten_device_tree(void)
 	dt_string_start = mem_start;
 	mem_start += 4; /* hole */
 
-	/* Add "linux,phandle" in there, we'll need it */
+	/* Add "phandle" in there, we'll need it */
 	namep = make_room(&mem_start, &mem_end, 16, 1);
-	strcpy(namep, "linux,phandle");
+	strcpy(namep, "phandle");
 	mem_start = (unsigned long)namep + strlen(namep) + 1;
 
 	/* Build string array */
@@ -3172,7 +3098,7 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 	 */
 	early_cmdline_parse();
 
-#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
+#ifdef CONFIG_PPC_PSERIES
 	/*
 	 * On pSeries, inform the firmware about our capabilities
 	 */
@@ -3216,15 +3142,9 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 	 * On non-powermacs, try to instantiate RTAS. PowerMacs don't
 	 * have a usable RTAS implementation.
 	 */
-	if (of_platform != PLATFORM_POWERMAC &&
-	    of_platform != PLATFORM_OPAL)
+	if (of_platform != PLATFORM_POWERMAC)
 		prom_instantiate_rtas();
 
-#ifdef CONFIG_PPC_POWERNV
-	if (of_platform == PLATFORM_OPAL)
-		prom_instantiate_opal();
-#endif /* CONFIG_PPC_POWERNV */
-
 #ifdef CONFIG_PPC64
 	/* instantiate sml */
 	prom_instantiate_sml();
@@ -3237,8 +3157,7 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 	 *
 	 * (This must be done after instanciating RTAS)
 	 */
-	if (of_platform != PLATFORM_POWERMAC &&
-	    of_platform != PLATFORM_OPAL)
+	if (of_platform != PLATFORM_POWERMAC)
 		prom_hold_cpus();
 
 	/*
@@ -3282,11 +3201,9 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 	/*
 	 * in case stdin is USB and still active on IBM machines...
 	 * Unfortunately quiesce crashes on some powermacs if we have
-	 * closed stdin already (in particular the powerbook 101). It
-	 * appears that the OPAL version of OFW doesn't like it either.
+	 * closed stdin already (in particular the powerbook 101).
 	 */
-	if (of_platform != PLATFORM_POWERMAC &&
-	    of_platform != PLATFORM_OPAL)
+	if (of_platform != PLATFORM_POWERMAC)
 		prom_close_stdin();
 
 	/*
@@ -3304,10 +3221,8 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 	hdr = dt_header_start;
 
 	/* Don't print anything after quiesce under OPAL, it crashes OFW */
-	if (of_platform != PLATFORM_OPAL) {
-		prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase);
-		prom_debug("->dt_header_start=0x%lx\n", hdr);
-	}
+	prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase);
+	prom_debug("->dt_header_start=0x%lx\n", hdr);
 
 #ifdef CONFIG_PPC32
 	reloc_got2(-offset);
@@ -3315,13 +3230,7 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
 	unreloc_toc();
 #endif
 
-#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
-	/* OPAL early debug gets the OPAL base & entry in r8 and r9 */
-	__start(hdr, kbase, 0, 0, 0,
-		prom_opal_base, prom_opal_entry);
-#else
 	__start(hdr, kbase, 0, 0, 0, 0, 0);
-#endif
 
 	return 0;
 }