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Diffstat (limited to 'c/src/lib/libbsp/powerpc/qoriq/include/asm/epapr_hcalls.h')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/qoriq/include/asm/epapr_hcalls.h | 573 |
1 files changed, 0 insertions, 573 deletions
diff --git a/c/src/lib/libbsp/powerpc/qoriq/include/asm/epapr_hcalls.h b/c/src/lib/libbsp/powerpc/qoriq/include/asm/epapr_hcalls.h deleted file mode 100644 index 3d87cca611..0000000000 --- a/c/src/lib/libbsp/powerpc/qoriq/include/asm/epapr_hcalls.h +++ /dev/null @@ -1,573 +0,0 @@ -/* - * ePAPR hcall interface - * - * Copyright 2008-2011 Freescale Semiconductor, Inc. - * - * Author: Timur Tabi <timur@freescale.com> - * - * This file is provided under a dual BSD/GPL license. When using or - * redistributing this file, you may do so under either license. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * * Neither the name of Freescale Semiconductor nor the - * names of its contributors may be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * - * ALTERNATIVELY, this software may be distributed under the terms of the - * GNU General Public License ("GPL") as published by the Free Software - * Foundation, either version 2 of that License or (at your option) any - * later version. - * - * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY - * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY - * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES - * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -/* A "hypercall" is an "sc 1" instruction. This header file file provides C - * wrapper functions for the ePAPR hypervisor interface. It is inteded - * for use by Linux device drivers and other operating systems. - * - * The hypercalls are implemented as inline assembly, rather than assembly - * language functions in a .S file, for optimization. It allows - * the caller to issue the hypercall instruction directly, improving both - * performance and memory footprint. - */ - -#ifndef _EPAPR_HCALLS_H -#define _EPAPR_HCALLS_H - -#include <uapi/asm/epapr_hcalls.h> - -#ifndef __ASSEMBLY__ -#include <sys/endian.h> - -/* - * Hypercall register clobber list - * - * These macros are used to define the list of clobbered registers during a - * hypercall. Technically, registers r0 and r3-r12 are always clobbered, - * but the gcc inline assembly syntax does not allow us to specify registers - * on the clobber list that are also on the input/output list. Therefore, - * the lists of clobbered registers depends on the number of register - * parmeters ("+r" and "=r") passed to the hypercall. - * - * Each assembly block should use one of the HCALL_CLOBBERSx macros. As a - * general rule, 'x' is the number of parameters passed to the assembly - * block *except* for r11. - * - * If you're not sure, just use the smallest value of 'x' that does not - * generate a compilation error. Because these are static inline functions, - * the compiler will only check the clobber list for a function if you - * compile code that calls that function. - * - * r3 and r11 are not included in any clobbers list because they are always - * listed as output registers. - * - * XER, CTR, and LR are currently listed as clobbers because it's uncertain - * whether they will be clobbered. - * - * Note that r11 can be used as an output parameter. - * - * The "memory" clobber is only necessary for hcalls where the Hypervisor - * will read or write guest memory. However, we add it to all hcalls because - * the impact is minimal, and we want to ensure that it's present for the - * hcalls that need it. -*/ - -/* List of common clobbered registers. Do not use this macro. */ -#define EV_HCALL_CLOBBERS "r0", "r12", "xer", "ctr", "lr", "cc", "memory" - -#define EV_HCALL_CLOBBERS8 EV_HCALL_CLOBBERS -#define EV_HCALL_CLOBBERS7 EV_HCALL_CLOBBERS8, "r10" -#define EV_HCALL_CLOBBERS6 EV_HCALL_CLOBBERS7, "r9" -#define EV_HCALL_CLOBBERS5 EV_HCALL_CLOBBERS6, "r8" -#define EV_HCALL_CLOBBERS4 EV_HCALL_CLOBBERS5, "r7" -#define EV_HCALL_CLOBBERS3 EV_HCALL_CLOBBERS4, "r6" -#define EV_HCALL_CLOBBERS2 EV_HCALL_CLOBBERS3, "r5" -#define EV_HCALL_CLOBBERS1 EV_HCALL_CLOBBERS2, "r4" - -extern bool epapr_paravirt_enabled; -extern uint32_t epapr_hypercall_start[]; - -#ifdef CONFIG_EPAPR_PARAVIRT -int __init epapr_paravirt_early_init(void); -#else -static inline int epapr_paravirt_early_init(void) { return 0; } -#endif - -/* - * We use "uintptr_t" to define a register because it's guaranteed to be a - * 32-bit integer on a 32-bit platform, and a 64-bit integer on a 64-bit - * platform. - * - * All registers are either input/output or output only. Registers that are - * initialized before making the hypercall are input/output. All - * input/output registers are represented with "+r". Output-only registers - * are represented with "=r". Do not specify any unused registers. The - * clobber list will tell the compiler that the hypercall modifies those - * registers, which is good enough. - */ - -/** - * ev_int_set_config - configure the specified interrupt - * @interrupt: the interrupt number - * @config: configuration for this interrupt - * @priority: interrupt priority - * @destination: destination CPU number - * - * Returns 0 for success, or an error code. - */ -static inline unsigned int ev_int_set_config(unsigned int interrupt, - uint32_t config, unsigned int priority, uint32_t destination) -{ - register uintptr_t r11 __asm__("r11"); - register uintptr_t r3 __asm__("r3"); - register uintptr_t r4 __asm__("r4"); - register uintptr_t r5 __asm__("r5"); - register uintptr_t r6 __asm__("r6"); - - r11 = EV_HCALL_TOKEN(EV_INT_SET_CONFIG); - r3 = interrupt; - r4 = config; - r5 = priority; - r6 = destination; - - asm volatile("bl epapr_hypercall_start" - : "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6) - : : EV_HCALL_CLOBBERS4 - ); - - return r3; -} - -/** - * ev_int_get_config - return the config of the specified interrupt - * @interrupt: the interrupt number - * @config: returned configuration for this interrupt - * @priority: returned interrupt priority - * @destination: returned destination CPU number - * - * Returns 0 for success, or an error code. - */ -static inline unsigned int ev_int_get_config(unsigned int interrupt, - uint32_t *config, unsigned int *priority, uint32_t *destination) -{ - register uintptr_t r11 __asm__("r11"); - register uintptr_t r3 __asm__("r3"); - register uintptr_t r4 __asm__("r4"); - register uintptr_t r5 __asm__("r5"); - register uintptr_t r6 __asm__("r6"); - - r11 = EV_HCALL_TOKEN(EV_INT_GET_CONFIG); - r3 = interrupt; - - asm volatile("bl epapr_hypercall_start" - : "+r" (r11), "+r" (r3), "=r" (r4), "=r" (r5), "=r" (r6) - : : EV_HCALL_CLOBBERS4 - ); - - *config = r4; - *priority = r5; - *destination = r6; - - return r3; -} - -/** - * ev_int_set_mask - sets the mask for the specified interrupt source - * @interrupt: the interrupt number - * @mask: 0=enable interrupts, 1=disable interrupts - * - * Returns 0 for success, or an error code. - */ -static inline unsigned int ev_int_set_mask(unsigned int interrupt, - unsigned int mask) -{ - register uintptr_t r11 __asm__("r11"); - register uintptr_t r3 __asm__("r3"); - register uintptr_t r4 __asm__("r4"); - - r11 = EV_HCALL_TOKEN(EV_INT_SET_MASK); - r3 = interrupt; - r4 = mask; - - asm volatile("bl epapr_hypercall_start" - : "+r" (r11), "+r" (r3), "+r" (r4) - : : EV_HCALL_CLOBBERS2 - ); - - return r3; -} - -/** - * ev_int_get_mask - returns the mask for the specified interrupt source - * @interrupt: the interrupt number - * @mask: returned mask for this interrupt (0=enabled, 1=disabled) - * - * Returns 0 for success, or an error code. - */ -static inline unsigned int ev_int_get_mask(unsigned int interrupt, - unsigned int *mask) -{ - register uintptr_t r11 __asm__("r11"); - register uintptr_t r3 __asm__("r3"); - register uintptr_t r4 __asm__("r4"); - - r11 = EV_HCALL_TOKEN(EV_INT_GET_MASK); - r3 = interrupt; - - asm volatile("bl epapr_hypercall_start" - : "+r" (r11), "+r" (r3), "=r" (r4) - : : EV_HCALL_CLOBBERS2 - ); - - *mask = r4; - - return r3; -} - -/** - * ev_int_eoi - signal the end of interrupt processing - * @interrupt: the interrupt number - * - * This function signals the end of processing for the the specified - * interrupt, which must be the interrupt currently in service. By - * definition, this is also the highest-priority interrupt. - * - * Returns 0 for success, or an error code. - */ -static inline unsigned int ev_int_eoi(unsigned int interrupt) -{ - register uintptr_t r11 __asm__("r11"); - register uintptr_t r3 __asm__("r3"); - - r11 = EV_HCALL_TOKEN(EV_INT_EOI); - r3 = interrupt; - - asm volatile("bl epapr_hypercall_start" - : "+r" (r11), "+r" (r3) - : : EV_HCALL_CLOBBERS1 - ); - - return r3; -} - -/** - * ev_byte_channel_send - send characters to a byte stream - * @handle: byte stream handle - * @count: (input) num of chars to send, (output) num chars sent - * @buffer: pointer to a 16-byte buffer - * - * @buffer must be at least 16 bytes long, because all 16 bytes will be - * read from memory into registers, even if count < 16. - * - * Returns 0 for success, or an error code. - */ -static inline unsigned int ev_byte_channel_send(unsigned int handle, - unsigned int *count, const char buffer[EV_BYTE_CHANNEL_MAX_BYTES]) -{ - register uintptr_t r11 __asm__("r11"); - register uintptr_t r3 __asm__("r3"); - register uintptr_t r4 __asm__("r4"); - register uintptr_t r5 __asm__("r5"); - register uintptr_t r6 __asm__("r6"); - register uintptr_t r7 __asm__("r7"); - register uintptr_t r8 __asm__("r8"); - const uint32_t *p = (const uint32_t *) buffer; - - r11 = EV_HCALL_TOKEN(EV_BYTE_CHANNEL_SEND); - r3 = handle; - r4 = *count; - r5 = be32toh(p[0]); - r6 = be32toh(p[1]); - r7 = be32toh(p[2]); - r8 = be32toh(p[3]); - - asm volatile("bl epapr_hypercall_start" - : "+r" (r11), "+r" (r3), - "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7), "+r" (r8) - : : EV_HCALL_CLOBBERS6 - ); - - *count = r4; - - return r3; -} - -/** - * ev_byte_channel_receive - fetch characters from a byte channel - * @handle: byte channel handle - * @count: (input) max num of chars to receive, (output) num chars received - * @buffer: pointer to a 16-byte buffer - * - * The size of @buffer must be at least 16 bytes, even if you request fewer - * than 16 characters, because we always write 16 bytes to @buffer. This is - * for performance reasons. - * - * Returns 0 for success, or an error code. - */ -static inline unsigned int ev_byte_channel_receive(unsigned int handle, - unsigned int *count, char buffer[EV_BYTE_CHANNEL_MAX_BYTES]) -{ - register uintptr_t r11 __asm__("r11"); - register uintptr_t r3 __asm__("r3"); - register uintptr_t r4 __asm__("r4"); - register uintptr_t r5 __asm__("r5"); - register uintptr_t r6 __asm__("r6"); - register uintptr_t r7 __asm__("r7"); - register uintptr_t r8 __asm__("r8"); - uint32_t *p = (uint32_t *) buffer; - - r11 = EV_HCALL_TOKEN(EV_BYTE_CHANNEL_RECEIVE); - r3 = handle; - r4 = *count; - - asm volatile("bl epapr_hypercall_start" - : "+r" (r11), "+r" (r3), "+r" (r4), - "=r" (r5), "=r" (r6), "=r" (r7), "=r" (r8) - : : EV_HCALL_CLOBBERS6 - ); - - *count = r4; - p[0] = htobe32(r5); - p[1] = htobe32(r6); - p[2] = htobe32(r7); - p[3] = htobe32(r8); - - return r3; -} - -/** - * ev_byte_channel_poll - returns the status of the byte channel buffers - * @handle: byte channel handle - * @rx_count: returned count of bytes in receive queue - * @tx_count: returned count of free space in transmit queue - * - * This function reports the amount of data in the receive queue (i.e. the - * number of bytes you can read), and the amount of free space in the transmit - * queue (i.e. the number of bytes you can write). - * - * Returns 0 for success, or an error code. - */ -static inline unsigned int ev_byte_channel_poll(unsigned int handle, - unsigned int *rx_count, unsigned int *tx_count) -{ - register uintptr_t r11 __asm__("r11"); - register uintptr_t r3 __asm__("r3"); - register uintptr_t r4 __asm__("r4"); - register uintptr_t r5 __asm__("r5"); - - r11 = EV_HCALL_TOKEN(EV_BYTE_CHANNEL_POLL); - r3 = handle; - - asm volatile("bl epapr_hypercall_start" - : "+r" (r11), "+r" (r3), "=r" (r4), "=r" (r5) - : : EV_HCALL_CLOBBERS3 - ); - - *rx_count = r4; - *tx_count = r5; - - return r3; -} - -/** - * ev_int_iack - acknowledge an interrupt - * @handle: handle to the target interrupt controller - * @vector: returned interrupt vector - * - * If handle is zero, the function returns the next interrupt source - * number to be handled irrespective of the hierarchy or cascading - * of interrupt controllers. If non-zero, specifies a handle to the - * interrupt controller that is the target of the acknowledge. - * - * Returns 0 for success, or an error code. - */ -static inline unsigned int ev_int_iack(unsigned int handle, - unsigned int *vector) -{ - register uintptr_t r11 __asm__("r11"); - register uintptr_t r3 __asm__("r3"); - register uintptr_t r4 __asm__("r4"); - - r11 = EV_HCALL_TOKEN(EV_INT_IACK); - r3 = handle; - - asm volatile("bl epapr_hypercall_start" - : "+r" (r11), "+r" (r3), "=r" (r4) - : : EV_HCALL_CLOBBERS2 - ); - - *vector = r4; - - return r3; -} - -/** - * ev_doorbell_send - send a doorbell to another partition - * @handle: doorbell send handle - * - * Returns 0 for success, or an error code. - */ -static inline unsigned int ev_doorbell_send(unsigned int handle) -{ - register uintptr_t r11 __asm__("r11"); - register uintptr_t r3 __asm__("r3"); - - r11 = EV_HCALL_TOKEN(EV_DOORBELL_SEND); - r3 = handle; - - asm volatile("bl epapr_hypercall_start" - : "+r" (r11), "+r" (r3) - : : EV_HCALL_CLOBBERS1 - ); - - return r3; -} - -/** - * ev_idle -- wait for next interrupt on this core - * - * Returns 0 for success, or an error code. - */ -static inline unsigned int ev_idle(void) -{ - register uintptr_t r11 __asm__("r11"); - register uintptr_t r3 __asm__("r3"); - - r11 = EV_HCALL_TOKEN(EV_IDLE); - - asm volatile("bl epapr_hypercall_start" - : "+r" (r11), "=r" (r3) - : : EV_HCALL_CLOBBERS1 - ); - - return r3; -} - -#ifdef CONFIG_EPAPR_PARAVIRT -static inline unsigned long epapr_hypercall(unsigned long *in, - unsigned long *out, - unsigned long nr) -{ - unsigned long register r0 asm("r0"); - unsigned long register r3 asm("r3") = in[0]; - unsigned long register r4 asm("r4") = in[1]; - unsigned long register r5 asm("r5") = in[2]; - unsigned long register r6 asm("r6") = in[3]; - unsigned long register r7 asm("r7") = in[4]; - unsigned long register r8 asm("r8") = in[5]; - unsigned long register r9 asm("r9") = in[6]; - unsigned long register r10 asm("r10") = in[7]; - unsigned long register r11 asm("r11") = nr; - unsigned long register r12 asm("r12"); - - asm volatile("bl epapr_hypercall_start" - : "=r"(r0), "=r"(r3), "=r"(r4), "=r"(r5), "=r"(r6), - "=r"(r7), "=r"(r8), "=r"(r9), "=r"(r10), "=r"(r11), - "=r"(r12) - : "r"(r3), "r"(r4), "r"(r5), "r"(r6), "r"(r7), "r"(r8), - "r"(r9), "r"(r10), "r"(r11) - : "memory", "cc", "xer", "ctr", "lr"); - - out[0] = r4; - out[1] = r5; - out[2] = r6; - out[3] = r7; - out[4] = r8; - out[5] = r9; - out[6] = r10; - out[7] = r11; - - return r3; -} -#else -static unsigned long epapr_hypercall(unsigned long *in, - unsigned long *out, - unsigned long nr) -{ - return EV_UNIMPLEMENTED; -} -#endif - -static inline long epapr_hypercall0_1(unsigned int nr, unsigned long *r2) -{ - unsigned long in[8]; - unsigned long out[8]; - unsigned long r; - - r = epapr_hypercall(in, out, nr); - *r2 = out[0]; - - return r; -} - -static inline long epapr_hypercall0(unsigned int nr) -{ - unsigned long in[8]; - unsigned long out[8]; - - return epapr_hypercall(in, out, nr); -} - -static inline long epapr_hypercall1(unsigned int nr, unsigned long p1) -{ - unsigned long in[8]; - unsigned long out[8]; - - in[0] = p1; - return epapr_hypercall(in, out, nr); -} - -static inline long epapr_hypercall2(unsigned int nr, unsigned long p1, - unsigned long p2) -{ - unsigned long in[8]; - unsigned long out[8]; - - in[0] = p1; - in[1] = p2; - return epapr_hypercall(in, out, nr); -} - -static inline long epapr_hypercall3(unsigned int nr, unsigned long p1, - unsigned long p2, unsigned long p3) -{ - unsigned long in[8]; - unsigned long out[8]; - - in[0] = p1; - in[1] = p2; - in[2] = p3; - return epapr_hypercall(in, out, nr); -} - -static inline long epapr_hypercall4(unsigned int nr, unsigned long p1, - unsigned long p2, unsigned long p3, - unsigned long p4) -{ - unsigned long in[8]; - unsigned long out[8]; - - in[0] = p1; - in[1] = p2; - in[2] = p3; - in[3] = p4; - return epapr_hypercall(in, out, nr); -} -#endif /* !__ASSEMBLY__ */ -#endif /* _EPAPR_HCALLS_H */ |