[PATCH] clean up pseries hcall interfaces
Anton Blanchard
anton at samba.org
Wed Jul 19 08:01:28 EST 2006
Our pseries hcall interfaces are out of control:
plpar_hcall_norets
plpar_hcall
plpar_hcall_8arg_2ret
plpar_hcall_4out
plpar_hcall_7arg_7ret
plpar_hcall_9arg_9ret
Create 3 interfaces to cover all cases:
plpar_hcall_norets: 7 arguments no returns
plpar_hcall: 6 arguments 4 returns
plpar_hcall9: 9 arguments 9 returns
There are only 2 cases in the kernel that need plpar_hcall9, hopefully
we can keep it that way.
Pass in a buffer to stash return parameters so we avoid the &dummy1,
&dummy2 madness.
Signed-off-by: Anton Blanchard <anton at samba.org>
--
Index: build/arch/powerpc/kernel/lparcfg.c
===================================================================
--- build.orig/arch/powerpc/kernel/lparcfg.c 2006-07-18 04:20:13.000000000 +1000
+++ build/arch/powerpc/kernel/lparcfg.c 2006-07-18 04:24:08.000000000 +1000
@@ -183,8 +183,14 @@ static unsigned int h_get_ppp(unsigned l
unsigned long *resource)
{
unsigned long rc;
- rc = plpar_hcall_4out(H_GET_PPP, 0, 0, 0, 0, entitled, unallocated,
- aggregation, resource);
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+ rc = plpar_hcall(H_GET_PPP, retbuf);
+
+ *entitled = retbuf[0];
+ *unallocated = retbuf[1];
+ *aggregation = retbuf[2];
+ *resource = retbuf[3];
log_plpar_hcall_return(rc, "H_GET_PPP");
@@ -194,8 +200,12 @@ static unsigned int h_get_ppp(unsigned l
static void h_pic(unsigned long *pool_idle_time, unsigned long *num_procs)
{
unsigned long rc;
- unsigned long dummy;
- rc = plpar_hcall(H_PIC, 0, 0, 0, 0, pool_idle_time, num_procs, &dummy);
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+ rc = plpar_hcall(H_PIC, retbuf);
+
+ *pool_idle_time = retbuf[0];
+ *num_procs = retbuf[1];
if (rc != H_AUTHORITY)
log_plpar_hcall_return(rc, "H_PIC");
Index: build/arch/powerpc/kernel/rtas.c
===================================================================
--- build.orig/arch/powerpc/kernel/rtas.c 2006-07-18 04:20:13.000000000 +1000
+++ build/arch/powerpc/kernel/rtas.c 2006-07-18 04:24:08.000000000 +1000
@@ -666,15 +666,14 @@ static int rtas_ibm_suspend_me(struct rt
int i;
long state;
long rc;
- unsigned long dummy;
-
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
struct rtas_suspend_me_data data;
/* Make sure the state is valid */
- rc = plpar_hcall(H_VASI_STATE,
- ((u64)args->args[0] << 32) | args->args[1],
- 0, 0, 0,
- &state, &dummy, &dummy);
+ rc = plpar_hcall(H_VASI_STATE, retbuf,
+ ((u64)args->args[0] << 32) | args->args[1]);
+
+ state = retbuf[0];
if (rc) {
printk(KERN_ERR "rtas_ibm_suspend_me: vasi_state returned %ld\n",rc);
Index: build/arch/powerpc/platforms/pseries/hvCall.S
===================================================================
--- build.orig/arch/powerpc/platforms/pseries/hvCall.S 2006-07-18 04:20:13.000000000 +1000
+++ build/arch/powerpc/platforms/pseries/hvCall.S 2006-07-19 06:59:32.000000000 +1000
@@ -1,7 +1,6 @@
/*
* This file contains the generic code to perform a call to the
* pSeries LPAR hypervisor.
- * NOTE: this file will go away when we move to inline this work.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -16,42 +15,6 @@
.text
-/* long plpar_hcall(unsigned long opcode, R3
- unsigned long arg1, R4
- unsigned long arg2, R5
- unsigned long arg3, R6
- unsigned long arg4, R7
- unsigned long *out1, R8
- unsigned long *out2, R9
- unsigned long *out3); R10
- */
-_GLOBAL(plpar_hcall)
- HMT_MEDIUM
-
- mfcr r0
-
- std r8,STK_PARM(r8)(r1) /* Save out ptrs */
- std r9,STK_PARM(r9)(r1)
- std r10,STK_PARM(r10)(r1)
-
- stw r0,8(r1)
-
- HVSC /* invoke the hypervisor */
-
- lwz r0,8(r1)
-
- ld r8,STK_PARM(r8)(r1) /* Fetch r4-r6 ret args */
- ld r9,STK_PARM(r9)(r1)
- ld r10,STK_PARM(r10)(r1)
- std r4,0(r8)
- std r5,0(r9)
- std r6,0(r10)
-
- mtcrf 0xff,r0
- blr /* return r3 = status */
-
-
-/* Simple interface with no output values (other than status) */
_GLOBAL(plpar_hcall_norets)
HMT_MEDIUM
@@ -64,164 +27,64 @@ _GLOBAL(plpar_hcall_norets)
mtcrf 0xff,r0
blr /* return r3 = status */
-
-/* long plpar_hcall_8arg_2ret(unsigned long opcode, R3
- unsigned long arg1, R4
- unsigned long arg2, R5
- unsigned long arg3, R6
- unsigned long arg4, R7
- unsigned long arg5, R8
- unsigned long arg6, R9
- unsigned long arg7, R10
- unsigned long arg8, 112(R1)
- unsigned long *out1); 120(R1)
- */
-_GLOBAL(plpar_hcall_8arg_2ret)
+_GLOBAL(plpar_hcall)
HMT_MEDIUM
mfcr r0
- ld r11,STK_PARM(r11)(r1) /* put arg8 in R11 */
stw r0,8(r1)
- HVSC /* invoke the hypervisor */
-
- lwz r0,8(r1)
- ld r10,STK_PARM(r12)(r1) /* Fetch r4 ret arg */
- std r4,0(r10)
- mtcrf 0xff,r0
- blr /* return r3 = status */
-
-
-/* long plpar_hcall_4out(unsigned long opcode, R3
- unsigned long arg1, R4
- unsigned long arg2, R5
- unsigned long arg3, R6
- unsigned long arg4, R7
- unsigned long *out1, R8
- unsigned long *out2, R9
- unsigned long *out3, R10
- unsigned long *out4); 112(R1)
- */
-_GLOBAL(plpar_hcall_4out)
- HMT_MEDIUM
-
- mfcr r0
- stw r0,8(r1)
+ std r4,STK_PARM(r4)(r1) /* Save ret buffer */
- std r8,STK_PARM(r8)(r1) /* Save out ptrs */
- std r9,STK_PARM(r9)(r1)
- std r10,STK_PARM(r10)(r1)
+ mr r4,r5
+ mr r5,r6
+ mr r6,r7
+ mr r7,r8
+ mr r8,r9
+ mr r9,r10
HVSC /* invoke the hypervisor */
- lwz r0,8(r1)
-
- ld r8,STK_PARM(r8)(r1) /* Fetch r4-r7 ret args */
- ld r9,STK_PARM(r9)(r1)
- ld r10,STK_PARM(r10)(r1)
- ld r11,STK_PARM(r11)(r1)
- std r4,0(r8)
- std r5,0(r9)
- std r6,0(r10)
- std r7,0(r11)
-
- mtcrf 0xff,r0
- blr /* return r3 = status */
-
-/* plpar_hcall_7arg_7ret(unsigned long opcode, R3
- unsigned long arg1, R4
- unsigned long arg2, R5
- unsigned long arg3, R6
- unsigned long arg4, R7
- unsigned long arg5, R8
- unsigned long arg6, R9
- unsigned long arg7, R10
- unsigned long *out1, 112(R1)
- unsigned long *out2, 110(R1)
- unsigned long *out3, 108(R1)
- unsigned long *out4, 106(R1)
- unsigned long *out5, 104(R1)
- unsigned long *out6, 102(R1)
- unsigned long *out7); 100(R1)
-*/
-_GLOBAL(plpar_hcall_7arg_7ret)
- HMT_MEDIUM
-
- mfcr r0
- stw r0,8(r1)
-
- HVSC /* invoke the hypervisor */
+ ld r12,STK_PARM(r4)(r1)
+ std r4, 0(r12)
+ std r5, 8(r12)
+ std r6, 16(r12)
+ std r7, 24(r12)
lwz r0,8(r1)
-
- ld r11,STK_PARM(r11)(r1) /* Fetch r4 ret arg */
- std r4,0(r11)
- ld r11,STK_PARM(r12)(r1) /* Fetch r5 ret arg */
- std r5,0(r11)
- ld r11,STK_PARM(r13)(r1) /* Fetch r6 ret arg */
- std r6,0(r11)
- ld r11,STK_PARM(r14)(r1) /* Fetch r7 ret arg */
- std r7,0(r11)
- ld r11,STK_PARM(r15)(r1) /* Fetch r8 ret arg */
- std r8,0(r11)
- ld r11,STK_PARM(r16)(r1) /* Fetch r9 ret arg */
- std r9,0(r11)
- ld r11,STK_PARM(r17)(r1) /* Fetch r10 ret arg */
- std r10,0(r11)
-
mtcrf 0xff,r0
blr /* return r3 = status */
-/* plpar_hcall_9arg_9ret(unsigned long opcode, R3
- unsigned long arg1, R4
- unsigned long arg2, R5
- unsigned long arg3, R6
- unsigned long arg4, R7
- unsigned long arg5, R8
- unsigned long arg6, R9
- unsigned long arg7, R10
- unsigned long arg8, 112(R1)
- unsigned long arg9, 110(R1)
- unsigned long *out1, 108(R1)
- unsigned long *out2, 106(R1)
- unsigned long *out3, 104(R1)
- unsigned long *out4, 102(R1)
- unsigned long *out5, 100(R1)
- unsigned long *out6, 98(R1)
- unsigned long *out7); 96(R1)
- unsigned long *out8, 94(R1)
- unsigned long *out9, 92(R1)
-*/
-_GLOBAL(plpar_hcall_9arg_9ret)
+_GLOBAL(plpar_hcall9)
HMT_MEDIUM
mfcr r0
stw r0,8(r1)
- ld r11,STK_PARM(r11)(r1) /* put arg8 in R11 */
- ld r12,STK_PARM(r12)(r1) /* put arg9 in R12 */
+ std r4,STK_PARM(r4)(r1) /* Save ret buffer */
+
+ mr r4,r5
+ mr r5,r6
+ mr r6,r7
+ mr r7,r8
+ mr r8,r9
+ mr r9,r10
+ ld r10,STK_PARM(r11)(r1) /* put arg7 in R10 */
+ ld r11,STK_PARM(r12)(r1) /* put arg8 in R11 */
+ ld r12,STK_PARM(r13)(r1) /* put arg9 in R12 */
HVSC /* invoke the hypervisor */
- ld r0,STK_PARM(r13)(r1) /* Fetch r4 ret arg */
- stdx r4,r0,r0
- ld r0,STK_PARM(r14)(r1) /* Fetch r5 ret arg */
- stdx r5,r0,r0
- ld r0,STK_PARM(r15)(r1) /* Fetch r6 ret arg */
- stdx r6,r0,r0
- ld r0,STK_PARM(r16)(r1) /* Fetch r7 ret arg */
- stdx r7,r0,r0
- ld r0,STK_PARM(r17)(r1) /* Fetch r8 ret arg */
- stdx r8,r0,r0
- ld r0,STK_PARM(r18)(r1) /* Fetch r9 ret arg */
- stdx r9,r0,r0
- ld r0,STK_PARM(r19)(r1) /* Fetch r10 ret arg */
- stdx r10,r0,r0
- ld r0,STK_PARM(r20)(r1) /* Fetch r11 ret arg */
- stdx r11,r0,r0
- ld r0,STK_PARM(r21)(r1) /* Fetch r12 ret arg */
- stdx r12,r0,r0
+ ld r12,STK_PARM(r4)(r1)
+ std r4, 0(r12)
+ std r5, 8(r12)
+ std r6, 16(r12)
+ std r7, 24(r12)
+ std r8, 32(r12)
+ std r9, 40(r12)
+ std r10,48(r12)
+ std r11,56(r12)
+ std r12,64(r12)
lwz r0,8(r1)
mtcrf 0xff,r0
Index: build/arch/powerpc/platforms/pseries/hvconsole.c
===================================================================
--- build.orig/arch/powerpc/platforms/pseries/hvconsole.c 2006-07-18 04:20:13.000000000 +1000
+++ build/arch/powerpc/platforms/pseries/hvconsole.c 2006-07-18 04:24:08.000000000 +1000
@@ -27,6 +27,7 @@
#include <linux/module.h>
#include <asm/hvcall.h>
#include <asm/hvconsole.h>
+#include "plpar_wrappers.h"
/**
* hvc_get_chars - retrieve characters from firmware for denoted vterm adatper
@@ -40,9 +41,9 @@ int hvc_get_chars(uint32_t vtermno, char
{
unsigned long got;
- if (plpar_hcall(H_GET_TERM_CHAR, vtermno, 0, 0, 0, &got,
- (unsigned long *)buf, (unsigned long *)buf+1) == H_SUCCESS)
+ if (plpar_get_term_char(vtermno, &got, buf) == H_SUCCESS)
return got;
+
return 0;
}
Index: build/arch/powerpc/platforms/pseries/lpar.c
===================================================================
--- build.orig/arch/powerpc/platforms/pseries/lpar.c 2006-07-18 04:20:13.000000000 +1000
+++ build/arch/powerpc/platforms/pseries/lpar.c 2006-07-18 04:24:08.000000000 +1000
@@ -48,13 +48,11 @@
#define DBG_LOW(fmt...) do { } while(0)
#endif
-/* in pSeries_hvCall.S */
+/* in hvCall.S */
EXPORT_SYMBOL(plpar_hcall);
-EXPORT_SYMBOL(plpar_hcall_4out);
+EXPORT_SYMBOL(plpar_hcall9);
EXPORT_SYMBOL(plpar_hcall_norets);
-EXPORT_SYMBOL(plpar_hcall_8arg_2ret);
-EXPORT_SYMBOL(plpar_hcall_7arg_7ret);
-EXPORT_SYMBOL(plpar_hcall_9arg_9ret);
+
extern void pSeries_find_serial_port(void);
@@ -277,7 +275,6 @@ long pSeries_lpar_hpte_insert(unsigned l
unsigned long flags;
unsigned long slot;
unsigned long hpte_v, hpte_r;
- unsigned long dummy0, dummy1;
if (!(vflags & HPTE_V_BOLTED))
DBG_LOW("hpte_insert(group=%lx, va=%016lx, pa=%016lx, "
@@ -302,8 +299,7 @@ long pSeries_lpar_hpte_insert(unsigned l
if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE))
hpte_r &= ~_PAGE_COHERENT;
- lpar_rc = plpar_hcall(H_ENTER, flags, hpte_group, hpte_v,
- hpte_r, &slot, &dummy0, &dummy1);
+ lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot);
if (unlikely(lpar_rc == H_PTEG_FULL)) {
if (!(vflags & HPTE_V_BOLTED))
DBG_LOW(" full\n");
Index: build/arch/powerpc/platforms/pseries/plpar_wrappers.h
===================================================================
--- build.orig/arch/powerpc/platforms/pseries/plpar_wrappers.h 2006-07-18 04:20:13.000000000 +1000
+++ build/arch/powerpc/platforms/pseries/plpar_wrappers.h 2006-07-18 04:27:14.000000000 +1000
@@ -5,20 +5,17 @@
static inline long poll_pending(void)
{
- unsigned long dummy;
- return plpar_hcall(H_POLL_PENDING, 0, 0, 0, 0, &dummy, &dummy, &dummy);
+ return plpar_hcall_norets(H_POLL_PENDING);
}
static inline long prod_processor(void)
{
- plpar_hcall_norets(H_PROD);
- return 0;
+ return plpar_hcall_norets(H_PROD);
}
static inline long cede_processor(void)
{
- plpar_hcall_norets(H_CEDE);
- return 0;
+ return plpar_hcall_norets(H_CEDE);
}
static inline long vpa_call(unsigned long flags, unsigned long cpu,
@@ -42,21 +39,47 @@ static inline long register_vpa(unsigned
extern void vpa_init(int cpu);
+static inline long plpar_pte_enter(unsigned long flags,
+ unsigned long hpte_group, unsigned long hpte_v,
+ unsigned long hpte_r, unsigned long *slot)
+{
+ long rc;
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+ rc = plpar_hcall(H_ENTER, retbuf, flags, hpte_group, hpte_v, hpte_r);
+
+ *slot = retbuf[0];
+
+ return rc;
+}
+
static inline long plpar_pte_remove(unsigned long flags, unsigned long ptex,
unsigned long avpn, unsigned long *old_pteh_ret,
unsigned long *old_ptel_ret)
{
- unsigned long dummy;
- return plpar_hcall(H_REMOVE, flags, ptex, avpn, 0, old_pteh_ret,
- old_ptel_ret, &dummy);
+ long rc;
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+ rc = plpar_hcall(H_REMOVE, retbuf, flags, ptex, avpn);
+
+ *old_pteh_ret = retbuf[0];
+ *old_ptel_ret = retbuf[1];
+
+ return rc;
}
static inline long plpar_pte_read(unsigned long flags, unsigned long ptex,
unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
{
- unsigned long dummy;
- return plpar_hcall(H_READ, flags, ptex, 0, 0, old_pteh_ret,
- old_ptel_ret, &dummy);
+ long rc;
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+ rc = plpar_hcall(H_READ, retbuf, flags, ptex);
+
+ *old_pteh_ret = retbuf[0];
+ *old_ptel_ret = retbuf[1];
+
+ return rc;
}
static inline long plpar_pte_protect(unsigned long flags, unsigned long ptex,
@@ -68,9 +91,14 @@ static inline long plpar_pte_protect(uns
static inline long plpar_tce_get(unsigned long liobn, unsigned long ioba,
unsigned long *tce_ret)
{
- unsigned long dummy;
- return plpar_hcall(H_GET_TCE, liobn, ioba, 0, 0, tce_ret, &dummy,
- &dummy);
+ long rc;
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+ rc = plpar_hcall(H_GET_TCE, retbuf, liobn, ioba);
+
+ *tce_ret = retbuf[0];
+
+ return rc;
}
static inline long plpar_tce_put(unsigned long liobn, unsigned long ioba,
@@ -94,9 +122,17 @@ static inline long plpar_tce_stuff(unsig
static inline long plpar_get_term_char(unsigned long termno,
unsigned long *len_ret, char *buf_ret)
{
+ long rc;
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
unsigned long *lbuf = (unsigned long *)buf_ret; /* TODO: alignment? */
- return plpar_hcall(H_GET_TERM_CHAR, termno, 0, 0, 0, len_ret,
- lbuf + 0, lbuf + 1);
+
+ rc = plpar_hcall(H_GET_TERM_CHAR, retbuf, termno);
+
+ *len_ret = retbuf[0];
+ lbuf[0] = retbuf[1];
+ lbuf[1] = retbuf[2];
+
+ return rc;
}
static inline long plpar_put_term_char(unsigned long termno, unsigned long len,
@@ -107,4 +143,31 @@ static inline long plpar_put_term_char(u
lbuf[1]);
}
+static inline long plpar_eoi(unsigned long xirr)
+{
+ return plpar_hcall_norets(H_EOI, xirr);
+}
+
+static inline long plpar_cppr(unsigned long cppr)
+{
+ return plpar_hcall_norets(H_CPPR, cppr);
+}
+
+static inline long plpar_ipi(unsigned long servernum, unsigned long mfrr)
+{
+ return plpar_hcall_norets(H_IPI, servernum, mfrr);
+}
+
+static inline long plpar_xirr(unsigned long *xirr_ret)
+{
+ long rc;
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+ rc = plpar_hcall(H_XIRR, retbuf);
+
+ *xirr_ret = retbuf[0];
+
+ return rc;
+}
+
#endif /* _PSERIES_PLPAR_WRAPPERS_H */
Index: build/arch/powerpc/platforms/pseries/xics.c
===================================================================
--- build.orig/arch/powerpc/platforms/pseries/xics.c 2006-07-18 04:21:59.000000000 +1000
+++ build/arch/powerpc/platforms/pseries/xics.c 2006-07-18 04:25:58.000000000 +1000
@@ -34,6 +34,7 @@
#include <asm/i8259.h>
#include "xics.h"
+#include "plpar_wrappers.h"
#define XICS_IPI 2
#define XICS_IRQ_SPURIOUS 0
@@ -110,27 +111,6 @@ static inline void direct_qirr_info(int
/* LPAR low level accessors */
-static inline long plpar_eoi(unsigned long xirr)
-{
- return plpar_hcall_norets(H_EOI, xirr);
-}
-
-static inline long plpar_cppr(unsigned long cppr)
-{
- return plpar_hcall_norets(H_CPPR, cppr);
-}
-
-static inline long plpar_ipi(unsigned long servernum, unsigned long mfrr)
-{
- return plpar_hcall_norets(H_IPI, servernum, mfrr);
-}
-
-static inline long plpar_xirr(unsigned long *xirr_ret)
-{
- unsigned long dummy;
- return plpar_hcall(H_XIRR, 0, 0, 0, 0, xirr_ret, &dummy, &dummy);
-}
-
static inline unsigned int lpar_xirr_info_get(int n_cpu)
{
unsigned long lpar_rc;
Index: build/drivers/net/ibmveth.c
===================================================================
--- build.orig/drivers/net/ibmveth.c 2006-07-18 04:20:13.000000000 +1000
+++ build/drivers/net/ibmveth.c 2006-07-18 04:24:08.000000000 +1000
@@ -702,7 +702,8 @@ static int ibmveth_start_xmit(struct sk_
desc[3].desc,
desc[4].desc,
desc[5].desc,
- correlator);
+ correlator,
+ &correlator);
} while ((lpar_rc == H_BUSY) && (retry_count--));
if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
Index: build/drivers/net/ibmveth.h
===================================================================
--- build.orig/drivers/net/ibmveth.h 2006-07-18 04:20:13.000000000 +1000
+++ build/drivers/net/ibmveth.h 2006-07-19 06:55:56.000000000 +1000
@@ -61,8 +61,21 @@
#define h_add_logical_lan_buffer(ua, buf) \
plpar_hcall_norets(H_ADD_LOGICAL_LAN_BUFFER, ua, buf)
-#define h_send_logical_lan(ua, buf1, buf2, buf3, buf4, buf5, buf6, correlator) \
- plpar_hcall_8arg_2ret(H_SEND_LOGICAL_LAN, ua, buf1, buf2, buf3, buf4, buf5, buf6, correlator, &correlator)
+static inline long h_send_logical_lan(unsigned long unit_address,
+ unsigned long desc1, unsigned long desc2, unsigned long desc3,
+ unsigned long desc4, unsigned long desc5, unsigned long desc6,
+ unsigned long corellator_in, unsigned long *corellator_out)
+{
+ long rc;
+ unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
+
+ rc = plpar_hcall9(H_SEND_LOGICAL_LAN, retbuf, unit_address, desc1,
+ desc2, desc3, desc4, desc5, desc6, corellator_in);
+
+ *corellator_out = retbuf[0];
+
+ return rc;
+}
#define h_multicast_ctrl(ua, cmd, mac) \
plpar_hcall_norets(H_MULTICAST_CTRL, ua, cmd, mac)
Index: build/include/asm-powerpc/hvcall.h
===================================================================
--- build.orig/include/asm-powerpc/hvcall.h 2006-07-18 04:20:13.000000000 +1000
+++ build/include/asm-powerpc/hvcall.h 2006-07-19 07:16:14.000000000 +1000
@@ -204,94 +204,39 @@
#ifndef __ASSEMBLY__
-/* plpar_hcall() -- Generic call interface using above opcodes
+/**
+ * plpar_hcall_norets: - Make a pseries hypervisor call with no return arguments
+ * @opcode: The hypervisor call to make.
*
- * The actual call interface is a hypervisor call instruction with
- * the opcode in R3 and input args in R4-R7.
- * Status is returned in R3 with variable output values in R4-R11.
- * Only H_PTE_READ with H_READ_4 uses R6-R11 so we ignore it for now
- * and return only two out args which MUST ALWAYS BE PROVIDED.
- */
-long plpar_hcall(unsigned long opcode,
- unsigned long arg1,
- unsigned long arg2,
- unsigned long arg3,
- unsigned long arg4,
- unsigned long *out1,
- unsigned long *out2,
- unsigned long *out3);
-
-/* Same as plpar_hcall but for those opcodes that return no values
- * other than status. Slightly more efficient.
+ * This call supports up to 7 arguments and only returns the status of
+ * the hcall. Use this version where possible, its slightly faster than
+ * the other plpar_hcalls.
*/
long plpar_hcall_norets(unsigned long opcode, ...);
-/*
- * Special hcall interface for ibmveth support.
- * Takes 8 input parms. Returns a rc and stores the
- * R4 return value in *out1.
- */
-long plpar_hcall_8arg_2ret(unsigned long opcode,
- unsigned long arg1,
- unsigned long arg2,
- unsigned long arg3,
- unsigned long arg4,
- unsigned long arg5,
- unsigned long arg6,
- unsigned long arg7,
- unsigned long arg8,
- unsigned long *out1);
-
-/* plpar_hcall_4out()
+/**
+ * plpar_hcall: - Make a pseries hypervisor call
+ * @opcode: The hypervisor call to make.
+ * @retbuf: Buffer to store up to 4 return arguments in.
*
- * same as plpar_hcall except with 4 output arguments.
+ * This call supports up to 6 arguments and 4 return arguments. Use
+ * PLPAR_HCALL_BUFSIZE to size the return argument buffer.
*
+ * Used for all but the craziest of phyp interfaces (see plpar_hcall9)
*/
-long plpar_hcall_4out(unsigned long opcode,
- unsigned long arg1,
- unsigned long arg2,
- unsigned long arg3,
- unsigned long arg4,
- unsigned long *out1,
- unsigned long *out2,
- unsigned long *out3,
- unsigned long *out4);
+#define PLPAR_HCALL_BUFSIZE 4
+long plpar_hcall(unsigned long opcode, unsigned long *retbuf, ...);
-long plpar_hcall_7arg_7ret(unsigned long opcode,
- unsigned long arg1,
- unsigned long arg2,
- unsigned long arg3,
- unsigned long arg4,
- unsigned long arg5,
- unsigned long arg6,
- unsigned long arg7,
- unsigned long *out1,
- unsigned long *out2,
- unsigned long *out3,
- unsigned long *out4,
- unsigned long *out5,
- unsigned long *out6,
- unsigned long *out7);
-
-long plpar_hcall_9arg_9ret(unsigned long opcode,
- unsigned long arg1,
- unsigned long arg2,
- unsigned long arg3,
- unsigned long arg4,
- unsigned long arg5,
- unsigned long arg6,
- unsigned long arg7,
- unsigned long arg8,
- unsigned long arg9,
- unsigned long *out1,
- unsigned long *out2,
- unsigned long *out3,
- unsigned long *out4,
- unsigned long *out5,
- unsigned long *out6,
- unsigned long *out7,
- unsigned long *out8,
- unsigned long *out9);
+/**
+ * plpar_hcall9: - Make a pseries hypervisor call with up to 9 return arguments
+ * @opcode: The hypervisor call to make.
+ * @retbuf: Buffer to store up to 9 return arguments in.
+ *
+ * This call supports up to 9 arguments and 9 return arguments. Use
+ * PLPAR_HCALL9_BUFSIZE to size the return argument buffer.
+ */
+#define PLPAR_HCALL9_BUFSIZE 9
+long plpar_hcall9(unsigned long opcode, unsigned long *retbuf, ...);
#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */
More information about the Linuxppc-dev
mailing list