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arm: Move systick device creation from NVIC to ARMv7M object

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There's no particular reason why the NVIC should be owning the
SysTick device objects; move them into the ARMv7M container object
instead, as part of consolidating the "create the devices which are
built into an M-profile CPU and map them into their architected
locations in the address space" work into one place.

This involves temporarily creating a duplicate copy of the
nvic_sysreg_ns_ops struct and its read/write functions (renamed as
v7m_sysreg_ns_*), but we will delete the NVIC's copy of this code in
a subsequent patch.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Luc Michel <luc@lmichel.fr>
Message-id: 20210812093356.1946-3-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2021-08-12 10:33:33 +01:00
parent 2f9db77ea8
commit e36a25cb47
4 changed files with 137 additions and 77 deletions
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12
include/hw/arm/armv7m.h
View file

@ -60,11 +60,23 @@ struct ARMv7MState {
BitBandState bitband[ARMV7M_NUM_BITBANDS];
ARMCPU *cpu;
ARMv7MRAS ras;
SysTickState systick[M_REG_NUM_BANKS];
/* MemoryRegion we pass to the CPU, with our devices layered on
* top of the ones the board provides in board_memory.
*/
MemoryRegion container;
/*
* MemoryRegion which passes the transaction to either the S or the
* NS systick device depending on the transaction attributes
*/
MemoryRegion systickmem;
/*
* MemoryRegion which enforces the S/NS handling of the systick
* device NS alias region and passes the transaction to the
* NS systick device if appropriate.
*/
MemoryRegion systick_ns_mem;
/* Properties */
char *cpu_type;