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hw: register: Run post_write hook on reset 

Ensure that the post write hook is called during reset. This allows us
to rely on the post write functions instead of having to call them from
the reset() function.

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: d131e24b911653a945e46ca2d8f90f572469e1dd.1517856214.git.alistair.francis@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Alistair Francis 2018-03-01 11:05:43 +00:00 committed by Peter Maydell
parent 6697439794
commit 4e5f0fb72e
2 changed files with 11 additions and 3 deletions
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8
hw/core/register.c
View File

@ -159,13 +159,21 @@ uint64_t register_read(RegisterInfo *reg, uint64_t re, const char* prefix,
void register_reset(RegisterInfo *reg)
{
const RegisterAccessInfo *ac;
g_assert(reg);
if (!reg->data || !reg->access) {
return;
}
ac = reg->access;
register_write_val(reg, reg->access->reset);
if (ac->post_write) {
ac->post_write(reg, reg->access->reset);
}
}
void register_init(RegisterInfo *reg)

6
include/hw/register.h
View File

@ -34,7 +34,7 @@ typedef struct RegisterInfoArray RegisterInfoArray;
* immediately before the actual write. The returned value is what is written,
* giving the handler a chance to modify the written value.
* @post_write: Post write callback. Passed the written value. Most write side
* effects should be implemented here.
* effects should be implemented here. This is called during device reset.
*
* @post_read: Post read callback. Passes the value that is about to be returned
* for a read. The return value from this function is what is ultimately read,
@ -135,8 +135,8 @@ uint64_t register_read(RegisterInfo *reg, uint64_t re, const char* prefix,
bool debug);
/**
* reset a register
* @reg: register to reset
* Resets a register. This will also call the post_write hook if it exists.
* @reg: The register to reset.
*/
void register_reset(RegisterInfo *reg);