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authorRalf Baechle <ralf@linux-mips.org>2006-04-05 09:45:45 +0100
committerRalf Baechle <ralf@linux-mips.org>2006-04-19 04:14:27 +0200
commit2600990e640e3bef29ed89d565864cf16ee83833 (patch)
tree7c7a43916d509d56ad89b951c485c7d75f40468e /arch/mips/kernel/vpe.c
parentbce1a28686ed6527977a198f698278b67c6bf9ec (diff)
downloadlinux-stericsson-2600990e640e3bef29ed89d565864cf16ee83833.tar.gz
[MIPS] kpsd and other AP/SP improvements.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/vpe.c')
-rw-r--r--arch/mips/kernel/vpe.c659
1 files changed, 434 insertions, 225 deletions
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index ae83b755cf4a..80ffaa6d50ad 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -13,7 +13,6 @@
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
*/
/*
@@ -27,11 +26,8 @@
*
* To load and run, simply cat a SP 'program file' to /dev/vpe1.
* i.e cat spapp >/dev/vpe1.
- *
- * You'll need to have the following device files.
- * mknod /dev/vpe0 c 63 0
- * mknod /dev/vpe1 c 63 1
*/
+
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
@@ -55,6 +51,8 @@
#include <asm/cpu.h>
#include <asm/processor.h>
#include <asm/system.h>
+#include <asm/vpe.h>
+#include <asm/kspd.h>
typedef void *vpe_handle;
@@ -68,6 +66,11 @@ typedef void *vpe_handle;
static char module_name[] = "vpe";
static int major;
+#ifdef CONFIG_MIPS_APSP_KSPD
+ static struct kspd_notifications kspd_events;
+static int kspd_events_reqd = 0;
+#endif
+
/* grab the likely amount of memory we will need. */
#ifdef CONFIG_MIPS_VPE_LOADER_TOM
#define P_SIZE (2 * 1024 * 1024)
@@ -76,7 +79,10 @@ static int major;
#define P_SIZE (256 * 1024)
#endif
+extern unsigned long physical_memsize;
+
#define MAX_VPES 16
+#define VPE_PATH_MAX 256
enum vpe_state {
VPE_STATE_UNUSED = 0,
@@ -102,6 +108,8 @@ struct vpe {
unsigned long len;
char *pbuffer;
unsigned long plen;
+ unsigned int uid, gid;
+ char cwd[VPE_PATH_MAX];
unsigned long __start;
@@ -113,6 +121,9 @@ struct vpe {
/* shared symbol address */
void *shared_ptr;
+
+ /* the list of who wants to know when something major happens */
+ struct list_head notify;
};
struct tc {
@@ -138,7 +149,7 @@ struct vpecontrol_ {
} vpecontrol;
static void release_progmem(void *ptr);
-static void dump_vpe(struct vpe * v);
+/* static __attribute_used__ void dump_vpe(struct vpe * v); */
extern void save_gp_address(unsigned int secbase, unsigned int rel);
/* get the vpe associated with this minor */
@@ -146,12 +157,14 @@ struct vpe *get_vpe(int minor)
{
struct vpe *v;
+ if (!cpu_has_mipsmt)
+ return NULL;
+
list_for_each_entry(v, &vpecontrol.vpe_list, list) {
if (v->minor == minor)
return v;
}
- printk(KERN_DEBUG "VPE: get_vpe minor %d not found\n", minor);
return NULL;
}
@@ -165,8 +178,6 @@ struct tc *get_tc(int index)
return t;
}
- printk(KERN_DEBUG "VPE: get_tc index %d not found\n", index);
-
return NULL;
}
@@ -179,8 +190,6 @@ struct tc *get_tc_unused(void)
return t;
}
- printk(KERN_DEBUG "VPE: All TC's are in use\n");
-
return NULL;
}
@@ -190,13 +199,13 @@ struct vpe *alloc_vpe(int minor)
struct vpe *v;
if ((v = kzalloc(sizeof(struct vpe), GFP_KERNEL)) == NULL) {
- printk(KERN_WARNING "VPE: alloc_vpe no mem\n");
return NULL;
}
INIT_LIST_HEAD(&v->tc);
list_add_tail(&v->list, &vpecontrol.vpe_list);
+ INIT_LIST_HEAD(&v->notify);
v->minor = minor;
return v;
}
@@ -207,7 +216,6 @@ struct tc *alloc_tc(int index)
struct tc *t;
if ((t = kzalloc(sizeof(struct tc), GFP_KERNEL)) == NULL) {
- printk(KERN_WARNING "VPE: alloc_tc no mem\n");
return NULL;
}
@@ -236,20 +244,16 @@ void dump_mtregs(void)
printk("config3 0x%lx MT %ld\n", val,
(val & CONFIG3_MT) >> CONFIG3_MT_SHIFT);
- val = read_c0_mvpconf0();
- printk("mvpconf0 0x%lx, PVPE %ld PTC %ld M %ld\n", val,
- (val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT,
- val & MVPCONF0_PTC, (val & MVPCONF0_M) >> MVPCONF0_M_SHIFT);
-
val = read_c0_mvpcontrol();
printk("MVPControl 0x%lx, STLB %ld VPC %ld EVP %ld\n", val,
(val & MVPCONTROL_STLB) >> MVPCONTROL_STLB_SHIFT,
(val & MVPCONTROL_VPC) >> MVPCONTROL_VPC_SHIFT,
(val & MVPCONTROL_EVP));
- val = read_c0_vpeconf0();
- printk("VPEConf0 0x%lx MVP %ld\n", val,
- (val & VPECONF0_MVP) >> VPECONF0_MVP_SHIFT);
+ val = read_c0_mvpconf0();
+ printk("mvpconf0 0x%lx, PVPE %ld PTC %ld M %ld\n", val,
+ (val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT,
+ val & MVPCONF0_PTC, (val & MVPCONF0_M) >> MVPCONF0_M_SHIFT);
}
/* Find some VPE program space */
@@ -354,9 +358,9 @@ static int apply_r_mips_gprel16(struct module *me, uint32_t *location,
}
if( (rel > 32768) || (rel < -32768) ) {
- printk(KERN_ERR
- "apply_r_mips_gprel16: relative address out of range 0x%x %d\n",
- rel, rel);
+ printk(KERN_DEBUG "VPE loader: apply_r_mips_gprel16: "
+ "relative address 0x%x out of range of gp register\n",
+ rel);
return -ENOEXEC;
}
@@ -374,8 +378,8 @@ static int apply_r_mips_pc16(struct module *me, uint32_t *location,
rel -= 1; // and one instruction less due to the branch delay slot.
if( (rel > 32768) || (rel < -32768) ) {
- printk(KERN_ERR
- "apply_r_mips_pc16: relative address out of range 0x%x\n", rel);
+ printk(KERN_DEBUG "VPE loader: "
+ "apply_r_mips_pc16: relative address out of range 0x%x\n", rel);
return -ENOEXEC;
}
@@ -396,7 +400,8 @@ static int apply_r_mips_26(struct module *me, uint32_t *location,
Elf32_Addr v)
{
if (v % 4) {
- printk(KERN_ERR "module %s: dangerous relocation mod4\n", me->name);
+ printk(KERN_DEBUG "VPE loader: apply_r_mips_26 "
+ " unaligned relocation\n");
return -ENOEXEC;
}
@@ -459,12 +464,13 @@ static int apply_r_mips_lo16(struct module *me, uint32_t *location,
/*
* The value for the HI16 had best be the same.
*/
- if (v != l->value) {
- printk("%d != %d\n", v, l->value);
- goto out_danger;
+ if (v != l->value) {
+ printk(KERN_DEBUG "VPE loader: "
+ "apply_r_mips_lo16/hi16: "
+ "inconsistent value information\n");
+ return -ENOEXEC;
}
-
/*
* Do the HI16 relocation. Note that we actually don't
* need to know anything about the LO16 itself, except
@@ -500,11 +506,6 @@ static int apply_r_mips_lo16(struct module *me, uint32_t *location,
*location = insnlo;
return 0;
-
-out_danger:
- printk(KERN_ERR "module %s: dangerous " "relocation\n", me->name);
-
- return -ENOEXEC;
}
static int (*reloc_handlers[]) (struct module *me, uint32_t *location,
@@ -518,6 +519,15 @@ static int (*reloc_handlers[]) (struct module *me, uint32_t *location,
[R_MIPS_PC16] = apply_r_mips_pc16
};
+static char *rstrs[] = {
+ [R_MIPS_NONE] = "MIPS_NONE",
+ [R_MIPS_32] = "MIPS_32",
+ [R_MIPS_26] = "MIPS_26",
+ [R_MIPS_HI16] = "MIPS_HI16",
+ [R_MIPS_LO16] = "MIPS_LO16",
+ [R_MIPS_GPREL16] = "MIPS_GPREL16",
+ [R_MIPS_PC16] = "MIPS_PC16"
+};
int apply_relocations(Elf32_Shdr *sechdrs,
const char *strtab,
@@ -552,15 +562,13 @@ int apply_relocations(Elf32_Shdr *sechdrs,
res = reloc_handlers[ELF32_R_TYPE(r_info)](me, location, v);
if( res ) {
- printk(KERN_DEBUG
- "relocation error 0x%x sym refer <%s> value 0x%x "
- "type 0x%x r_info 0x%x\n",
- (unsigned int)location, strtab + sym->st_name, v,
- r_info, ELF32_R_TYPE(r_info));
- }
-
- if (res)
+ char *r = rstrs[ELF32_R_TYPE(r_info)];
+ printk(KERN_WARNING "VPE loader: .text+0x%x "
+ "relocation type %s for symbol \"%s\" failed\n",
+ rel[i].r_offset, r ? r : "UNKNOWN",
+ strtab + sym->st_name);
return res;
+ }
}
return 0;
@@ -576,7 +584,7 @@ void save_gp_address(unsigned int secbase, unsigned int rel)
/* Change all symbols so that sh_value encodes the pointer directly. */
-static int simplify_symbols(Elf_Shdr * sechdrs,
+static void simplify_symbols(Elf_Shdr * sechdrs,
unsigned int symindex,
const char *strtab,
const char *secstrings,
@@ -585,18 +593,21 @@ static int simplify_symbols(Elf_Shdr * sechdrs,
Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr;
unsigned long secbase, bssbase = 0;
unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym);
- int ret = 0, size;
+ int size;
/* find the .bss section for COMMON symbols */
for (i = 0; i < nsecs; i++) {
- if (strncmp(secstrings + sechdrs[i].sh_name, ".bss", 4) == 0)
+ if (strncmp(secstrings + sechdrs[i].sh_name, ".bss", 4) == 0) {
bssbase = sechdrs[i].sh_addr;
+ break;
+ }
}
for (i = 1; i < n; i++) {
switch (sym[i].st_shndx) {
case SHN_COMMON:
- /* Allocate space for the symbol in the .bss section. st_value is currently size.
+ /* Allocate space for the symbol in the .bss section.
+ st_value is currently size.
We want it to have the address of the symbol. */
size = sym[i].st_value;
@@ -614,11 +625,9 @@ static int simplify_symbols(Elf_Shdr * sechdrs,
break;
case SHN_MIPS_SCOMMON:
-
- printk(KERN_DEBUG
- "simplify_symbols: ignoring SHN_MIPS_SCOMMON symbol <%s> st_shndx %d\n",
- strtab + sym[i].st_name, sym[i].st_shndx);
-
+ printk(KERN_DEBUG "simplify_symbols: ignoring SHN_MIPS_SCOMMON"
+ "symbol <%s> st_shndx %d\n", strtab + sym[i].st_name,
+ sym[i].st_shndx);
// .sbss section
break;
@@ -632,10 +641,7 @@ static int simplify_symbols(Elf_Shdr * sechdrs,
sym[i].st_value += secbase;
break;
}
-
}
-
- return ret;
}
#ifdef DEBUG_ELFLOADER
@@ -655,9 +661,26 @@ static void dump_elfsymbols(Elf_Shdr * sechdrs, unsigned int symindex,
static void dump_tc(struct tc *t)
{
- printk(KERN_WARNING "VPE: TC index %d TCStatus 0x%lx halt 0x%lx\n",
- t->index, read_tc_c0_tcstatus(), read_tc_c0_tchalt());
- printk(KERN_WARNING "VPE: tcrestart 0x%lx\n", read_tc_c0_tcrestart());
+ unsigned long val;
+
+ settc(t->index);
+ printk(KERN_DEBUG "VPE loader: TC index %d targtc %ld "
+ "TCStatus 0x%lx halt 0x%lx\n",
+ t->index, read_c0_vpecontrol() & VPECONTROL_TARGTC,
+ read_tc_c0_tcstatus(), read_tc_c0_tchalt());
+
+ printk(KERN_DEBUG " tcrestart 0x%lx\n", read_tc_c0_tcrestart());
+ printk(KERN_DEBUG " tcbind 0x%lx\n", read_tc_c0_tcbind());
+
+ val = read_c0_vpeconf0();
+ printk(KERN_DEBUG " VPEConf0 0x%lx MVP %ld\n", val,
+ (val & VPECONF0_MVP) >> VPECONF0_MVP_SHIFT);
+
+ printk(KERN_DEBUG " c0 status 0x%lx\n", read_vpe_c0_status());
+ printk(KERN_DEBUG " c0 cause 0x%lx\n", read_vpe_c0_cause());
+
+ printk(KERN_DEBUG " c0 badvaddr 0x%lx\n", read_vpe_c0_badvaddr());
+ printk(KERN_DEBUG " c0 epc 0x%lx\n", read_vpe_c0_epc());
}
static void dump_tclist(void)
@@ -672,96 +695,108 @@ static void dump_tclist(void)
/* We are prepared so configure and start the VPE... */
int vpe_run(struct vpe * v)
{
- unsigned long val;
+ struct vpe_notifications *n;
+ unsigned long val, dmt_flag;
struct tc *t;
/* check we are the Master VPE */
val = read_c0_vpeconf0();
if (!(val & VPECONF0_MVP)) {
printk(KERN_WARNING
- "VPE: only Master VPE's are allowed to configure MT\n");
+ "VPE loader: only Master VPE's are allowed to configure MT\n");
return -1;
}
/* disable MT (using dvpe) */
dvpe();
+ if (!list_empty(&v->tc)) {
+ if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) {
+ printk(KERN_WARNING "VPE loader: TC %d is already in use.\n",
+ t->index);
+ return -ENOEXEC;
+ }
+ } else {
+ printk(KERN_WARNING "VPE loader: No TC's associated with VPE %d\n",
+ v->minor);
+ return -ENOEXEC;
+ }
+
/* Put MVPE's into 'configuration state' */
set_c0_mvpcontrol(MVPCONTROL_VPC);
- if (!list_empty(&v->tc)) {
- if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) {
- printk(KERN_WARNING "VPE: TC %d is already in use.\n",
- t->index);
- return -ENOEXEC;
- }
- } else {
- printk(KERN_WARNING "VPE: No TC's associated with VPE %d\n",
- v->minor);
- return -ENOEXEC;
- }
-
settc(t->index);
- val = read_vpe_c0_vpeconf0();
-
/* should check it is halted, and not activated */
if ((read_tc_c0_tcstatus() & TCSTATUS_A) || !(read_tc_c0_tchalt() & TCHALT_H)) {
- printk(KERN_WARNING "VPE: TC %d is already doing something!\n",
+ printk(KERN_WARNING "VPE loader: TC %d is already doing something!\n",
t->index);
-
dump_tclist();
return -ENOEXEC;
}
+ /*
+ * Disable multi-threaded execution whilst we activate, clear the
+ * halt bit and bound the tc to the other VPE...
+ */
+ dmt_flag = dmt();
+
/* Write the address we want it to start running from in the TCPC register. */
write_tc_c0_tcrestart((unsigned long)v->__start);
-
- /* write the sivc_info address to tccontext */
write_tc_c0_tccontext((unsigned long)0);
-
- /* Set up the XTC bit in vpeconf0 to point at our tc */
- write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | (t->index << VPECONF0_XTC_SHIFT));
-
- /* mark the TC as activated, not interrupt exempt and not dynamically allocatable */
+ /*
+ * Mark the TC as activated, not interrupt exempt and not dynamically
+ * allocatable
+ */
val = read_tc_c0_tcstatus();
val = (val & ~(TCSTATUS_DA | TCSTATUS_IXMT)) | TCSTATUS_A;
write_tc_c0_tcstatus(val);
write_tc_c0_tchalt(read_tc_c0_tchalt() & ~TCHALT_H);
- /* set up VPE1 */
- write_vpe_c0_vpecontrol(read_vpe_c0_vpecontrol() & ~VPECONTROL_TE); // no multiple TC's
- write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA); // enable this VPE
-
/*
* The sde-kit passes 'memsize' to __start in $a3, so set something
- * here...
- * Or set $a3 (register 7) to zero and define DFLT_STACK_SIZE and
+ * here... Or set $a3 to zero and define DFLT_STACK_SIZE and
* DFLT_HEAP_SIZE when you compile your program
*/
+ mttgpr(7, physical_memsize);
+
+
+ /* set up VPE1 */
+ /*
+ * bind the TC to VPE 1 as late as possible so we only have the final
+ * VPE registers to set up, and so an EJTAG probe can trigger on it
+ */
+ write_tc_c0_tcbind((read_tc_c0_tcbind() & ~TCBIND_CURVPE) | v->minor);
- mttgpr(7, 0);
+ /* Set up the XTC bit in vpeconf0 to point at our tc */
+ write_vpe_c0_vpeconf0( (read_vpe_c0_vpeconf0() & ~(VPECONF0_XTC))
+ | (t->index << VPECONF0_XTC_SHIFT));
- /* set config to be the same as vpe0, particularly kseg0 coherency alg */
- write_vpe_c0_config(read_c0_config());
+ /* enable this VPE */
+ write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA);
/* clear out any left overs from a previous program */
+ write_vpe_c0_status(0);
write_vpe_c0_cause(0);
/* take system out of configuration state */
clear_c0_mvpcontrol(MVPCONTROL_VPC);
- /* clear interrupts enabled IE, ERL, EXL, and KSU from c0 status */
- write_vpe_c0_status(read_vpe_c0_status() & ~(ST0_ERL | ST0_KSU | ST0_IE | ST0_EXL));
+ /* now safe to re-enable multi-threading */
+ emt(dmt_flag);
/* set it running */
evpe(EVPE_ENABLE);
+ list_for_each_entry(n, &v->notify, list) {
+ n->start(v->minor);
+ }
+
return 0;
}
-static unsigned long find_vpe_symbols(struct vpe * v, Elf_Shdr * sechdrs,
+static int find_vpe_symbols(struct vpe * v, Elf_Shdr * sechdrs,
unsigned int symindex, const char *strtab,
struct module *mod)
{
@@ -778,26 +813,28 @@ static unsigned long find_vpe_symbols(struct vpe * v, Elf_Shdr * sechdrs,
}
}
+ if ( (v->__start == 0) || (v->shared_ptr == NULL))
+ return -1;
+
return 0;
}
/*
- * Allocates a VPE with some program code space(the load address), copies
- * the contents of the program (p)buffer performing relocatations/etc,
- * free's it when finished.
-*/
+ * Allocates a VPE with some program code space(the load address), copies the
+ * contents of the program (p)buffer performing relocatations/etc, free's it
+ * when finished.
+ */
int vpe_elfload(struct vpe * v)
{
Elf_Ehdr *hdr;
Elf_Shdr *sechdrs;
long err = 0;
char *secstrings, *strtab = NULL;
- unsigned int len, i, symindex = 0, strindex = 0;
-
+ unsigned int len, i, symindex = 0, strindex = 0, relocate = 0;
struct module mod; // so we can re-use the relocations code
memset(&mod, 0, sizeof(struct module));
- strcpy(mod.name, "VPE dummy prog module");
+ strcpy(mod.name, "VPE loader");
hdr = (Elf_Ehdr *) v->pbuffer;
len = v->plen;
@@ -805,16 +842,22 @@ int vpe_elfload(struct vpe * v)
/* Sanity checks against insmoding binaries or wrong arch,
weird elf version */
if (memcmp(hdr->e_ident, ELFMAG, 4) != 0
- || hdr->e_type != ET_REL || !elf_check_arch(hdr)
+ || (hdr->e_type != ET_REL && hdr->e_type != ET_EXEC)
+ || !elf_check_arch(hdr)
|| hdr->e_shentsize != sizeof(*sechdrs)) {
printk(KERN_WARNING
- "VPE program, wrong arch or weird elf version\n");
+ "VPE loader: program wrong arch or weird elf version\n");
return -ENOEXEC;
}
+ if (hdr->e_type == ET_REL)
+ relocate = 1;
+
if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr)) {
- printk(KERN_ERR "VPE program length %u truncated\n", len);
+ printk(KERN_ERR "VPE loader: program length %u truncated\n",
+ len);
+
return -ENOEXEC;
}
@@ -826,82 +869,126 @@ int vpe_elfload(struct vpe * v)
/* And these should exist, but gcc whinges if we don't init them */
symindex = strindex = 0;
- for (i = 1; i < hdr->e_shnum; i++) {
-
- if (sechdrs[i].sh_type != SHT_NOBITS
- && len < sechdrs[i].sh_offset + sechdrs[i].sh_size) {
- printk(KERN_ERR "VPE program length %u truncated\n",
- len);
- return -ENOEXEC;
- }
+ if (relocate) {
+ for (i = 1; i < hdr->e_shnum; i++) {
+ if (sechdrs[i].sh_type != SHT_NOBITS
+ && len < sechdrs[i].sh_offset + sechdrs[i].sh_size) {
+ printk(KERN_ERR "VPE program length %u truncated\n",
+ len);
+ return -ENOEXEC;
+ }
- /* Mark all sections sh_addr with their address in the
- temporary image. */
- sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset;
+ /* Mark all sections sh_addr with their address in the
+ temporary image. */
+ sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset;
- /* Internal symbols and strings. */
- if (sechdrs[i].sh_type == SHT_SYMTAB) {
- symindex = i;
- strindex = sechdrs[i].sh_link;
- strtab = (char *)hdr + sechdrs[strindex].sh_offset;
+ /* Internal symbols and strings. */
+ if (sechdrs[i].sh_type == SHT_SYMTAB) {
+ symindex = i;
+ strindex = sechdrs[i].sh_link;
+ strtab = (char *)hdr + sechdrs[strindex].sh_offset;
+ }
}
+ layout_sections(&mod, hdr, sechdrs, secstrings);
}
- layout_sections(&mod, hdr, sechdrs, secstrings);
-
v->load_addr = alloc_progmem(mod.core_size);
memset(v->load_addr, 0, mod.core_size);
- printk("VPE elf_loader: loading to %p\n", v->load_addr);
+ printk("VPE loader: loading to %p\n", v->load_addr);
- for (i = 0; i < hdr->e_shnum; i++) {
- void *dest;
+ if (relocate) {
+ for (i = 0; i < hdr->e_shnum; i++) {
+ void *dest;
- if (!(sechdrs[i].sh_flags & SHF_ALLOC))
- continue;
+ if (!(sechdrs[i].sh_flags & SHF_ALLOC))
+ continue;
- dest = v->load_addr + sechdrs[i].sh_entsize;
+ dest = v->load_addr + sechdrs[i].sh_entsize;
- if (sechdrs[i].sh_type != SHT_NOBITS)
- memcpy(dest, (void *)sechdrs[i].sh_addr,
- sechdrs[i].sh_size);
- /* Update sh_addr to point to copy in image. */
- sechdrs[i].sh_addr = (unsigned long)dest;
- }
+ if (sechdrs[i].sh_type != SHT_NOBITS)
+ memcpy(dest, (void *)sechdrs[i].sh_addr,
+ sechdrs[i].sh_size);
+ /* Update sh_addr to point to copy in image. */
+ sechdrs[i].sh_addr = (unsigned long)dest;
- /* Fix up syms, so that st_value is a pointer to location. */
- err =
- simplify_symbols(sechdrs, symindex, strtab, secstrings,
- hdr->e_shnum, &mod);
- if (err < 0) {
- printk(KERN_WARNING "VPE: unable to simplify symbols\n");
- goto cleanup;
- }
+ printk(KERN_DEBUG " section sh_name %s sh_addr 0x%x\n",
+ secstrings + sechdrs[i].sh_name, sechdrs[i].sh_addr);
+ }
- /* Now do relocations. */
- for (i = 1; i < hdr->e_shnum; i++) {
- const char *strtab = (char *)sechdrs[strindex].sh_addr;
- unsigned int info = sechdrs[i].sh_info;
-
- /* Not a valid relocation section? */
- if (info >= hdr->e_shnum)
- continue;
-
- /* Don't bother with non-allocated sections */
- if (!(sechdrs[info].sh_flags & SHF_ALLOC))
- continue;
-
- if (sechdrs[i].sh_type == SHT_REL)
- err =
- apply_relocations(sechdrs, strtab, symindex, i, &mod);
- else if (sechdrs[i].sh_type == SHT_RELA)
- err = apply_relocate_add(sechdrs, strtab, symindex, i,
- &mod);
- if (err < 0) {
- printk(KERN_WARNING
- "vpe_elfload: error in relocations err %ld\n",
- err);
- goto cleanup;
+ /* Fix up syms, so that st_value is a pointer to location. */
+ simplify_symbols(sechdrs, symindex, strtab, secstrings,
+ hdr->e_shnum, &mod);
+
+ /* Now do relocations. */
+ for (i = 1; i < hdr->e_shnum; i++) {
+ const char *strtab = (char *)sechdrs[strindex].sh_addr;
+ unsigned int info = sechdrs[i].sh_info;
+
+ /* Not a valid relocation section? */
+ if (info >= hdr->e_shnum)
+ continue;
+
+ /* Don't bother with non-allocated sections */
+ if (!(sechdrs[info].sh_flags & SHF_ALLOC))
+ continue;
+
+ if (sechdrs[i].sh_type == SHT_REL)
+ err = apply_relocations(sechdrs, strtab, symindex, i,
+ &mod);
+ else if (sechdrs[i].sh_type == SHT_RELA)
+ err = apply_relocate_add(sechdrs, strtab, symindex, i,
+ &mod);
+ if (err < 0)
+ return err;
+
+ }
+ } else {
+ for (i = 0; i < hdr->e_shnum; i++) {
+
+ /* Internal symbols and strings. */
+ if (sechdrs[i].sh_type == SHT_SYMTAB) {
+ symindex = i;
+ strindex = sechdrs[i].sh_link;
+ strtab = (char *)hdr + sechdrs[strindex].sh_offset;
+
+ /* mark the symtab's address for when we try to find the
+ magic symbols */
+ sechdrs[i].sh_addr = (size_t) hdr + sechdrs[i].sh_offset;
+ }
+
+ /* filter sections we dont want in the final image */
+ if (!(sechdrs[i].sh_flags & SHF_ALLOC) ||
+ (sechdrs[i].sh_type == SHT_MIPS_REGINFO)) {
+ printk( KERN_DEBUG " ignoring section, "
+ "name %s type %x address 0x%x \n",
+ secstrings + sechdrs[i].sh_name,
+ sechdrs[i].sh_type, sechdrs[i].sh_addr);
+ continue;
+ }
+
+ if (sechdrs[i].sh_addr < (unsigned int)v->load_addr) {
+ printk( KERN_WARNING "VPE loader: "
+ "fully linked image has invalid section, "
+ "name %s type %x address 0x%x, before load "
+ "address of 0x%x\n",
+ secstrings + sechdrs[i].sh_name,
+ sechdrs[i].sh_type, sechdrs[i].sh_addr,
+ (unsigned int)v->load_addr);
+ return -ENOEXEC;
+ }
+
+ printk(KERN_DEBUG " copying section sh_name %s, sh_addr 0x%x "
+ "size 0x%x0 from x%p\n",
+ secstrings + sechdrs[i].sh_name, sechdrs[i].sh_addr,
+ sechdrs[i].sh_size, hdr + sechdrs[i].sh_offset);
+
+ if (sechdrs[i].sh_type != SHT_NOBITS)
+ memcpy((void *)sechdrs[i].sh_addr,
+ (char *)hdr + sechdrs[i].sh_offset,
+ sechdrs[i].sh_size);
+ else
+ memset((void *)sechdrs[i].sh_addr, 0, sechdrs[i].sh_size);
}
}
@@ -910,71 +997,104 @@ int vpe_elfload(struct vpe * v)
(unsigned long)v->load_addr + v->len);
if ((find_vpe_symbols(v, sechdrs, symindex, strtab, &mod)) < 0) {
+ if (v->__start == 0) {
+ printk(KERN_WARNING "VPE loader: program does not contain "
+ "a __start symbol\n");
+ return -ENOEXEC;
+ }
- printk(KERN_WARNING
- "VPE: program doesn't contain __start or vpe_shared symbols\n");
- err = -ENOEXEC;
+ if (v->shared_ptr == NULL)
+ printk(KERN_WARNING "VPE loader: "
+ "program does not contain vpe_shared symbol.\n"
+ " Unable to use AMVP (AP/SP) facilities.\n");
}
printk(" elf loaded\n");
-
-cleanup:
- return err;
+ return 0;
}
-static void dump_vpe(struct vpe * v)
+__attribute_used__ void dump_vpe(struct vpe * v)
{
struct tc *t;
+ settc(v->minor);
+
printk(KERN_DEBUG "VPEControl 0x%lx\n", read_vpe_c0_vpecontrol());
printk(KERN_DEBUG "VPEConf0 0x%lx\n", read_vpe_c0_vpeconf0());
- list_for_each_entry(t, &vpecontrol.tc_list, list) {
+ list_for_each_entry(t, &vpecontrol.tc_list, list)
dump_tc(t);
- }
}
-/* checks for VPE is unused and gets ready to load program */
+static void cleanup_tc(struct tc *tc)
+{
+ int tmp;
+
+ /* Put MVPE's into 'configuration state' */
+ set_c0_mvpcontrol(MVPCONTROL_VPC);
+
+ settc(tc->index);
+ tmp = read_tc_c0_tcstatus();
+
+ /* mark not allocated and not dynamically allocatable */
+ tmp &= ~(TCSTATUS_A | TCSTATUS_DA);
+ tmp |= TCSTATUS_IXMT; /* interrupt exempt */
+ write_tc_c0_tcstatus(tmp);
+
+ write_tc_c0_tchalt(TCHALT_H);
+
+ /* bind it to anything other than VPE1 */
+ write_tc_c0_tcbind(read_tc_c0_tcbind() & ~TCBIND_CURVPE); // | TCBIND_CURVPE
+
+ clear_c0_mvpcontrol(MVPCONTROL_VPC);
+}
+
+static int getcwd(char *buff, int size)
+{
+ mm_segment_t old_fs;
+ int ret;
+
+ old_fs = get_fs();
+ set_fs(KERNEL_DS);
+
+ ret = sys_getcwd(buff,size);
+
+ set_fs(old_fs);
+
+ return ret;
+}
+
+/* checks VPE is unused and gets ready to load program */
static int vpe_open(struct inode *inode, struct file *filp)
{
- int minor;
+ int minor, ret;
struct vpe *v;
+ struct vpe_notifications *not;
/* assume only 1 device at the mo. */
if ((minor = MINOR(inode->i_rdev)) != 1) {
- printk(KERN_WARNING "VPE: only vpe1 is supported\n");
+ printk(KERN_WARNING "VPE loader: only vpe1 is supported\n");
return -ENODEV;
}
if ((v = get_vpe(minor)) == NULL) {
- printk(KERN_WARNING "VPE: unable to get vpe\n");
+ printk(KERN_WARNING "VPE loader: unable to get vpe\n");
return -ENODEV;
}
if (v->state != VPE_STATE_UNUSED) {
- unsigned long tmp;
- struct tc *t;
-
- printk(KERN_WARNING "VPE: device %d already in use\n", minor);
-
dvpe();
- dump_vpe(v);
-
- printk(KERN_WARNING "VPE: re-initialising %d\n", minor);
-
- release_progmem(v->load_addr);
- t = get_tc(minor);
- settc(minor);
- tmp = read_tc_c0_tcstatus();
+ printk(KERN_DEBUG "VPE loader: tc in use dumping regs\n");
- /* mark not allocated and not dynamically allocatable */
- tmp &= ~(TCSTATUS_A | TCSTATUS_DA);
- tmp |= TCSTATUS_IXMT; /* interrupt exempt */
- write_tc_c0_tcstatus(tmp);
+ dump_tc(get_tc(minor));
- write_tc_c0_tchalt(TCHALT_H);
+ list_for_each_entry(not, &v->notify, list) {
+ not->stop(minor);
+ }
+ release_progmem(v->load_addr);
+ cleanup_tc(get_tc(minor));
}
// allocate it so when we get write ops we know it's expected.
@@ -986,6 +1106,24 @@ static int vpe_open(struct inode *inode, struct file *filp)
v->load_addr = NULL;
v->len = 0;
+ v->uid = filp->f_uid;
+ v->gid = filp->f_gid;
+
+#ifdef CONFIG_MIPS_APSP_KSPD
+ /* get kspd to tell us when a syscall_exit happens */
+ if (!kspd_events_reqd) {
+ kspd_notify(&kspd_events);
+ kspd_events_reqd++;
+ }
+#endif
+
+ v->cwd[0] = 0;
+ ret = getcwd(v->cwd, VPE_PATH_MAX);
+ if (ret < 0)
+ printk(KERN_WARNING "VPE loader: open, getcwd returned %d\n", ret);
+
+ v->shared_ptr = NULL;
+ v->__start = 0;
return 0;
}
@@ -1006,14 +1144,22 @@ static int vpe_release(struct inode *inode, struct file *filp)
if (vpe_elfload(v) >= 0)
vpe_run(v);
else {
- printk(KERN_WARNING "VPE: ELF load failed.\n");
+ printk(KERN_WARNING "VPE loader: ELF load failed.\n");
ret = -ENOEXEC;
}
} else {
- printk(KERN_WARNING "VPE: only elf files are supported\n");
+ printk(KERN_WARNING "VPE loader: only elf files are supported\n");
ret = -ENOEXEC;
}
+ /* It's good to be able to run the SP and if it chokes have a look at
+ the /dev/rt?. But if we reset the pointer to the shared struct we
+ loose what has happened. So perhaps if garbage is sent to the vpe
+ device, use it as a trigger for the reset. Hopefully a nice
+ executable will be along shortly. */
+ if (ret < 0)
+ v->shared_ptr = NULL;
+
// cleanup any temp buffers
if (v->pbuffer)
vfree(v->pbuffer);
@@ -1033,21 +1179,19 @@ static ssize_t vpe_write(struct file *file, const char __user * buffer,
return -ENODEV;
if (v->pbuffer == NULL) {
- printk(KERN_ERR "vpe_write: no pbuffer\n");
+ printk(KERN_ERR "VPE loader: no buffer for program\n");
return -ENOMEM;
}
if ((count + v->len) > v->plen) {
printk(KERN_WARNING
- "VPE Loader: elf size too big. Perhaps strip uneeded symbols\n");
+ "VPE loader: elf size too big. Perhaps strip uneeded symbols\n");
return -ENOMEM;
}
count -= copy_from_user(v->pbuffer + v->len, buffer, count);
- if (!count) {
- printk("vpe_write: copy_to_user failed\n");
+ if (!count)
return -EFAULT;
- }
v->len += count;
return ret;
@@ -1149,16 +1293,70 @@ void *vpe_get_shared(int index)
{
struct vpe *v;
- if ((v = get_vpe(index)) == NULL) {
- printk(KERN_WARNING "vpe: invalid vpe index %d\n", index);
+ if ((v = get_vpe(index)) == NULL)
return NULL;
- }
return v->shared_ptr;
}
EXPORT_SYMBOL(vpe_get_shared);
+int vpe_getuid(int index)
+{
+ struct vpe *v;
+
+ if ((v = get_vpe(index)) == NULL)
+ return -1;
+
+ return v->uid;
+}
+
+EXPORT_SYMBOL(vpe_getuid);
+
+int vpe_getgid(int index)
+{
+ struct vpe *v;
+
+ if ((v = get_vpe(index)) == NULL)
+ return -1;
+
+ return v->gid;
+}
+
+EXPORT_SYMBOL(vpe_getgid);
+
+int vpe_notify(int index, struct vpe_notifications *notify)
+{
+ struct vpe *v;
+
+ if ((v = get_vpe(index)) == NULL)
+ return -1;
+
+ list_add(&notify->list, &v->notify);
+ return 0;
+}
+
+EXPORT_SYMBOL(vpe_notify);
+
+char *vpe_getcwd(int index)
+{
+ struct vpe *v;
+
+ if ((v = get_vpe(index)) == NULL)
+ return NULL;
+
+ return v->cwd;
+}
+
+EXPORT_SYMBOL(vpe_getcwd);
+
+#ifdef CONFIG_MIPS_APSP_KSPD
+static void kspd_sp_exit( int sp_id)
+{
+ cleanup_tc(get_tc(sp_id));
+}
+#endif
+
static int __init vpe_module_init(void)
{
struct vpe *v = NULL;
@@ -1201,7 +1399,8 @@ static int __init vpe_module_init(void)
return -ENODEV;
}
- list_add(&t->tc, &v->tc); /* add the tc to the list of this vpe's tc's. */
+ /* add the tc to the list of this vpe's tc's. */
+ list_add(&t->tc, &v->tc);
/* deactivate all but vpe0 */
if (i != 0) {
@@ -1222,10 +1421,12 @@ static int __init vpe_module_init(void)
~(ST0_IM | ST0_IE | ST0_KSU))
| ST0_CU0);
- /* set config to be the same as vpe0, particularly kseg0 coherency alg */
+ /*
+ * Set config to be the same as vpe0,
+ * particularly kseg0 coherency alg
+ */
write_vpe_c0_config(read_c0_config());
}
-
}
/* TC's */
@@ -1234,23 +1435,28 @@ static int __init vpe_module_init(void)
if (i != 0) {
unsigned long tmp;
- /* tc 0 will of course be running.... */
- if (i == 0)
- t->state = TC_STATE_RUNNING;
-
settc(i);
- /* bind a TC to each VPE, May as well put all excess TC's
- on the last VPE */
- if (i >= (((val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1))
- write_tc_c0_tcbind(read_tc_c0_tcbind() |
- ((val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT));
- else
- write_tc_c0_tcbind(read_tc_c0_tcbind() | i);
+ /* Any TC that is bound to VPE0 gets left as is - in case
+ we are running SMTC on VPE0. A TC that is bound to any
+ other VPE gets bound to VPE0, ideally I'd like to make
+ it homeless but it doesn't appear to let me bind a TC
+ to a non-existent VPE. Which is perfectly reasonable.
+
+ The (un)bound state is visible to an EJTAG probe so may
+ notify GDB...
+ */
+
+ if (((tmp = read_tc_c0_tcbind()) & TCBIND_CURVPE)) {
+ /* tc is bound >vpe0 */
+ write_tc_c0_tcbind(tmp & ~TCBIND_CURVPE);
+
+ t->pvpe = get_vpe(0); /* set the parent vpe */
+ }
tmp = read_tc_c0_tcstatus();
- /* mark not allocated and not dynamically allocatable */
+ /* mark not activated and not dynamically allocatable */
tmp &= ~(TCSTATUS_A | TCSTATUS_DA);
tmp |= TCSTATUS_IXMT; /* interrupt exempt */
write_tc_c0_tcstatus(tmp);
@@ -1262,6 +1468,9 @@ static int __init vpe_module_init(void)
/* release config state */
clear_c0_mvpcontrol(MVPCONTROL_VPC);
+#ifdef CONFIG_MIPS_APSP_KSPD
+ kspd_events.kspd_sp_exit = kspd_sp_exit;
+#endif
return 0;
}
@@ -1281,5 +1490,5 @@ static void __exit vpe_module_exit(void)
module_init(vpe_module_init);
module_exit(vpe_module_exit);
MODULE_DESCRIPTION("MIPS VPE Loader");
-MODULE_AUTHOR("Elizabeth Clarke, MIPS Technologies, Inc");
+MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc.");
MODULE_LICENSE("GPL");